A crystalline bicyclic acid derived from piperine; 5-(1,3-benzodioxol-5-yl)-2,4-pentadienoic acid, (OCH₂O)H₃C₆—(CH)₄—COOH.
Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。