无: not have; there is not; be w ...环: ring; hoop异: different戊: the fifth of the ten Heavenl ...间: space in between; opening二烯: diene化合物: chemical compound; compound异戊间二烯化合物: isoprenoid异戊二烯化合物: isoprenoid类异戊间二烯: isoprenoid异戊间二烯烃: isoprenoi hydrocarbon异戊二烯 异戊间二烯: isoprene二烯化合物: diolefin甲基异戊间二烯: methyl isoprene; methyl-isoprene顺聚异戊间二烯: cis-polyisoprene异戊间二烯骨架: isoprene skeleton异戊间二烯橡胶: isoprene rubber异戊间二烯骨架结构: isoprene skeleton异戊间二烯型链烷烃: isoprenoid alkane异戊间二烯型中心滑块: isoprene type centerblock二烯化合物;二烯烃: diolefin戊间二烯: piperylene戊间二烯;1: piperylene异戊二间烯化合物结构: isoprenoid structure四苯基环戊间二烯: tetraphyenylcyclopentadiene