diacetylWiktionary 原文构词拆分di-前缀Two. · Double, twice the quantity.+acetyl词根/词干词源说明From di- + acetyl.释义（英文）名词 Noun(organic chemistry, in combination) Two acetyl groups in a compound(organic chemistry) Synonym of butanedione.词族派生词（4）dacisteinediacetylnalorphinediacetylmorphinediacetylurea