Angelic acid reacts with hydrobromic acid and bromine producing hydrochloric and hydroiodic acids, respectively.
3.
The salts and esters of angelic acid are called "'angelates " '.
4.
Chemically, it is classified as a sesquiterpene and is the ester of petasol and angelic acid.
5.
Angelic acid esters are the active components of herbal medicine used against a wide range of various health disturbances including pains, fever, gout, heartburn, etc.
6.
"' Angelic acid "'is a cis " isomer of 2-methyl-2-butenoic acid, which easily converts to the " trans " isomer, tiglic acid, upon heating or reaction with inorganic acids.
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