azacoumarinWiktionary 原文英美构词拆解azaaza-前缀coumarincoumarin词干aza-(organic chemistry) Used to form names of organic compounds where a carbon atom is replaced by a nitrogen atom.词源说明From aza- + coumarin.释义名词noun1(organic chemistry) Any of several isomeric organic compound related to the coumarins but having a pyridine ring instead of a benzene ring