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Piperidine is an organic compound with the molecular formula (CH 2) 5 NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH 2 –) and one amine bridge (–NH–). It is a colorless liquid with an odor described as objectionable, typical of amines. [6]
The amount of piperine varies from 1–2% in long pepper, to 5–10% in commercial white and black peppers. [6] [7] Piperine can also be prepared by treating the solvent-free residue from a concentrated alcoholic extract of black pepper with a solution of potassium hydroxide to remove resin (said to contain chavicine, an isomer of piperine). [7]
Piperidine alkaloids are naturally occurring chemical compounds from the group of alkaloids, which are chemically derived from piperidine. Alkaloids with a piperidine building block are widespread and are usually further subdivided according to their occurrence and biogenetic origin. The most important representative of piperidine alkaloids is ...
Piperic acid is a chemical often obtained by the base-hydrolysis of the alkaloid piperine [1] from black pepper, [2] followed by acidification of the corresponding salt.Piperic acid is an intermediate in the synthesis of other compounds such as piperonal, and as-such may be used to produce fragrances, perfumes flavorants and drugs as well as other useful compounds.
Classical qualitative inorganic analysis is a method of analytical chemistry which seeks to find the elemental composition of inorganic compounds. It is mainly focused on detecting ions in an aqueous solution, therefore materials in other forms may need to be brought to this state before using standard methods.
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Black pepper (Piper nigrum) is a flowering vine in the family Piperaceae, cultivated for its fruit (the peppercorn), which is usually dried and used as a spice and seasoning. The fruit is a drupe (stonefruit) which is about 5 mm (0.20 in) in diameter (fresh and fully mature), dark red, and contains a stone which encloses a single pepper seed.
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