piracetamWiktionary 原文构词拆分pyrrolidine词根/词干+acetamide词根/词干词源说明Blend of pyrrolidine + acetamide.释义（英文）名词 Noun(organic chemistry) A nootropic drug, 2-oxo-1-pyrrolidine acetamide.词族派生词（1）phenylpiracetam