Xanthohumol is the main prenyl flavonoid of female inflorescences in the hops.

黄腐酚是啤酒雌花中主的含异戊二基的类黄。

Abstract： The C5 Fraction derived from ethylene steamcracker contains some very useful components, isoprene, cyclopentadiene and piperylene.

： 来裂的C5馏份含有非常有用的化工原料——异戊二、环戊二、戊间二。

The controls were homeochronous inpatients with affective disorder and normal individuals.lsoprene breath levels were measured by gas chromatography combined with mass spectroscopy(GC-MS).

用气相色谱一质谱联用仪检测其呼出气体中异戊二的浓度。