释义 |
pen·ta·none \ˈpentəˌnōn\ noun (-s) Etymology: pentane + -one : either of two isomeric flammable liquid ketones derived from normal pentane: a. : the unsymmetrical compound CH3CH2CH2COCH3 — called also methyl propyl ketone, 2-pentanone b. : the symmetrical compound (C2H5)2CO obtainable from propionic acid — called also diethyl ketone, 3-pentanone, propione |