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Related to tiglic acid: Angelic acid
A thick, syrupy poisonous liquid, C5H8O2, derived from croton oil, having a spicy odor and used in making perfumes and flavoring agents.
[New Latin (Croton) tiglium, croton species name, perhaps from Greek tīlos, diarrhea (from the use of croton oil as a purgative).]
(Chemistry) a syrupy liquid or crystalline colourless unsaturated carboxylic acid, with the trans-configuration, found in croton oil and used in perfumery; trans-2-methyl-2-butenoic acid. Formula: CH3CH:C(CH3)COOH
[C19 tiglic, from New Latin phrase Croton tiglium (name of the croton plant), of uncertain origin]