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Momordenol
Momordenol (3β-hydroxy-stigmasta-5,14-dien-16-one) is a natural chemical compound, a sterol found in the fresh fruit of the bitter melon (''Momordica charantia''). The compound is soluble in ethyl acetate and methanol but not in pure chloroform or petrol. It crystallizes as fine needles that melt at 160–161 °C. It was isolated in 1997 by S. Begum and others. See also * Momordicilin * Momordicin I * Momordicin-28 * Momordicinin * Momordol * Stigmasterol References {{Phytosterols Phytosterols Ketones Sterols ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Momordicin I
Momordicin I, or 3,7,23-trihydroxycucurbitan-5,24-dien-19-al, is a chemical compound found in the leaves of the bitter melon vine (''Momordica charantia''), possibly responsible for its reputed medicinal properties. The compound was isolated and characterized in 1984 by M. Yasuda and others M. Yasuda, M. Iwamoto, H. Okabe, and T. Yamauchi (1984), ''A New Cucurbitane Triterpenoid From Momordica charantia'', Chem. Pharm. Bull. volume 32, issue 6, pages 2044-2049 It is a white crystalline solid with formula , that melts at 125–128 °C.N. M. Puspawati (2008)''Isolation and Identification of Momordicin I from leaves extract of ''Momordica charantia'' L.''. Jurnal Kimia, volume 2, issue 1, pages 53-56 The compound can be extracted from ground dry leaves by dichloromethane. It is insoluble in water and soluble in methanol. A related glycoside, momordicoside, occurs in the unripe fruit.H. Okabe, Y. Miyahara, and T. Yamauci (1982), ''Studies on the Constituents of ''Momordica cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Momordicilin
Momordicilin or 24- ′-hydroxy,1′-methyl-2′-pentenyloxylursan-3-one is a chemical compound, a triterpenoid with formula , found in the fresh fruit of the bitter melon (''Momordica charantia'').Sabira Begum, Mansour Ahmed, Bina S. Siddiqui, Abdullah Khan, Zafar S. Saify, and Mohammed Arif (1997), ''Triterpenes, a sterol and a monocyclic alcohol from Momordica charantia.'' Phytochemistry, volume 44, issue 7, pages 1313-1320 The compound is soluble in ethyl acetate and chloroform but not in petrol. It crystallizes as needles that melt at 170−171 °C. It was isolated in 1997 by S. Begum and others. See also * Momordicin I * Momordicin-28 * Momordicinin * Momordenol Momordenol (3β-hydroxy-stigmasta-5,14-dien-16-one) is a natural chemical compound, a sterol found in the fresh fruit of the bitter melon (''Momordica charantia''). The compound is soluble in ethyl acetate and methanol but not in pure chloroform ... * Momordol References Triterpenes Ketones ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Momordicin-28
Momordicin-28 or 13-hydroxy-28-methoxy-urs-11-en-3-one is a triterpene compound with formula found in the fresh fruit of the bitter melon (''Momordica charantia'').Sabira Begum, Mansour Ahmed, Bina S. Siddiqui, Abdullah Khan, Zafar S. Saify, and Mohammed Arif (1997), ''Triterpenes, a sterol and a monocyclic alcohol from Momordica charantia.'' Phytochemistry, volume 44, issue 7, pages 1313-1320 The compound is soluble in ethyl acetate and chloroform but not in petrol. It crystallizes as fine needles that melt at 121−122 °C. It was isolated in 1997 by S. Begum and others. See also * Momordicin I * Momordicinin * Momordicilin * Momordenol Momordenol (3β-hydroxy-stigmasta-5,14-dien-16-one) is a natural chemical compound, a sterol found in the fresh fruit of the bitter melon (''Momordica charantia''). The compound is soluble in ethyl acetate and methanol but not in pure chloroform ... * Momordol References {{reflist Triterpenes Tertiary alcohols Ketones [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Momordicinin
Momordicinin (13β,28-epoxy-urs-11-en-3-one) is chemical compound, a triterpene with formula , found in the fresh fruit of the bitter melon (''Momordica charantia''). The compound is soluble in ethyl acetate and chloroform but not in petrol. It crystallizes as irregular plates that melt at 146−147 °C. It was isolated in 1997 by S. Begum and others. See also * Momordicin I * Momordicin-28 * Momordicilin * Momordenol Momordenol (3β-hydroxy-stigmasta-5,14-dien-16-one) is a natural chemical compound, a sterol found in the fresh fruit of the bitter melon (''Momordica charantia''). The compound is soluble in ethyl acetate and methanol but not in pure chloroform ... * Momordol References {{reflist Triterpenes Ketones ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Momordol
Momordol or 1-hydroxy-1,2-dimethyl-2- ′,10′-dihydroxy-4′,7′-dimethyl-11′-hydroxy methyl-trideca3-ethyl-cyclohex-5-en-4-one is a chemical compound with formula , found in the fresh fruit of the bitter melon (''Momordica charantia'').Sabira Begum, Mansour Ahmed, Bina S. Siddiqui, Abdullah Khan, Zafar S. Saify, and Mohammed Arif (1997), ''Triterpenes, a sterol and a monocyclic alcohol from Momordica charantia.'' Phytochemistry, volume 44, issue 7, pages 1313-1320 The compound is an oily liquid, soluble in ethyl acetate and methanol but not in pure chloroform or petrol. It was isolated in 1997 by S. Begum and others. See also * Momordicin I * Momordicin-28 * Momordicinin * Momordicilin * Momordenol Momordenol (3β-hydroxy-stigmasta-5,14-dien-16-one) is a natural chemical compound, a sterol found in the fresh fruit of the bitter melon (''Momordica charantia''). The compound is soluble in ethyl acetate and methanol but not in pure chloroform ... References {{reflist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element is therefore not a compound. A compound can be transformed into a different substance by a chemical reaction, which may involve interactions with other substances. In this process, bonds between atoms may be broken and/or new bonds formed. There are four major types of compounds, distinguished by how the constituent atoms are bonded together. Molecular compounds are held together by covalent bonds; ionic compounds are held together by ionic bonds; intermetallic compounds are held together by metallic bonds; coordination complexes are held together by coordinate covalent bonds. Non-stoichiometric compounds form a disputed marginal case. A chemical formula specifies the number of atoms of each element in a compound molecule, using the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sterol
Sterol is an organic compound with formula , whose molecule is derived from that of gonane by replacement of a hydrogen atom in position 3 by a hydroxyl group. It is therefore an alcohol of gonane. More generally, any compounds that contain the gonane structure, additional functional groups, and/or modified ring systems derived from gonane are called steroids. Therefore, sterols are a subgroup of the steroids. They occur naturally in most eukaryotes, including plants, animals, and fungi, and can also be produced by some bacteria (however likely with different functions). The most familiar type of animal sterol is cholesterol, which is vital to cell membrane structure, and functions as a precursor to fat-soluble vitamins and steroid hormones. While technically alcohols, sterols are classified by biochemists as lipids (fats in the broader sense of the term). Types Sterols of plants are called ''phytosterols'' and sterols of animals are called ''zoosterols''. The most importa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bitter Melon
''Momordica charantia'' (commonly called bitter melon; Goya; bitter apple; bitter gourd; bitter squash; balsam-pear; with many more names listed below) is a tropical and subtropical vine of the family Cucurbitaceae, widely grown in Asia, Africa, and the Caribbean for its edible fruit. Its many varieties differ substantially in the shape and bitterness of the fruit. Bitter melon originated in Africa where it was a dry-season staple food of ǃKung hunter-gatherers. Wild or semi-domesticated variants spread across Asia in prehistory, and it was likely fully domesticated in Southeast Asia. It is widely used in the cuisines of East Asia, South Asia, and Southeast Asia. Alternative names Bitter melon has many names in other languages, which have sometimes entered English as loanwords. Following are a few: Description This herbaceous, tendril-bearing vine grows up to in length. It bears simple, alternate leaves across, with three to seven deeply separated lobes. Each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethyl Acetate
Ethyl acetate ( systematically ethyl ethanoate, commonly abbreviated EtOAc, ETAC or EA) is the organic compound with the formula , simplified to . This colorless liquid has a characteristic sweet smell (similar to pear drops) and is used in glues, nail polish removers, and in the decaffeination process of tea and coffee. Ethyl acetate is the ester of ethanol and acetic acid; it is manufactured on a large scale for use as a solvent. Production and synthesis Ethyl acetate was first synthesized by the Count de Lauraguais in 1759 by distilling a mixture of ethanol and acetic acid. In 2004, an estimated 1.3 million tonnes were produced worldwide. The combined annual production in 1985 of Japan, North America, and Europe was about 400,000 tonnes. The global ethyl acetate market was valued at $3.3 billion in 2018. Ethyl acetate is synthesized in industry mainly via the classic Fischer esterification reaction of ethanol and acetic acid. This mixture converts to the ester in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methanol
Methanol (also called methyl alcohol and wood spirit, amongst other names) is an organic chemical and the simplest aliphatic alcohol, with the formula C H3 O H (a methyl group linked to a hydroxyl group, often abbreviated as MeOH). It is a light, volatile, colourless, flammable liquid with a distinctive alcoholic odour similar to that of ethanol (potable alcohol). A polar solvent, methanol acquired the name wood alcohol because it was once produced chiefly by the destructive distillation of wood. Today, methanol is mainly produced industrially by hydrogenation of carbon monoxide. Methanol consists of a methyl group linked to a polar hydroxyl group. With more than 20 million tons produced annually, it is used as a precursor to other commodity chemicals, including formaldehyde, acetic acid, methyl tert-butyl ether, methyl benzoate, anisole, peroxyacids, as well as a host of more specialised chemicals. Occurrence Small amounts of methanol are present in normal, healthy hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroform
Chloroform, or trichloromethane, is an organic compound with chemical formula, formula Carbon, CHydrogen, HChlorine, Cl3 and a common organic solvent. It is a colorless, strong-smelling, dense liquid produced on a large scale as a precursor to PTFE. It is also a precursor to various refrigerants. It is trihalomethane. It is a powerful anesthetic, euphoriant, anxiolytic, and sedative when inhaled or ingested. Structure The molecule adopts a tetrahedral molecular geometry with C3v symmetry group, symmetry. Natural occurrence The total global flux of chloroform through the environment is approximately tonnes per year, and about 90% of emissions are natural in origin. Many kinds of seaweed produce chloroform, and fungi are believed to produce chloroform in soil. Abiotic processes are also believed to contribute to natural chloroform productions in soils although the mechanism is still unclear. Chloroform volatilizes readily from soil and surface water and undergoes degradation in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petrol
Gasoline (; ) or petrol (; ) (see ) is a transparent, petroleum-derived flammable liquid that is used primarily as a fuel in most spark-ignited internal combustion engines (also known as petrol engines). It consists mostly of organic compounds obtained by the fractional distillation of petroleum, enhanced with a variety of additives. On average, U.S. refineries produce, from a barrel of crude oil, about 19 to 20 gallons of gasoline; 11 to 13 gallons of distillate fuel (most of which is sold as diesel fuel); and 3 to 4 gallons of jet fuel. The product ratio depends on the processing in an oil refinery and the crude oil assay. A barrel of oil is defined as holding 42 US gallons, which is about 159 liters or 35 imperial gallons. The characteristic of a particular gasoline blend to resist igniting too early (which causes knocking and reduces efficiency in reciprocating engines) is measured by its octane rating, which is produced in several grades. Tetraethyl lead and other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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