异戊二烯 Traditional form: 異戊二烯 Pinyin (reading): yìwù'èrxī Definitions: isoprene Characters: 异 - different, strange, unusual; foreign; surprising 戊 - 5th heavenly stem 二 - two; twice 烯 - alkene Traditional characters: 異 - different, strange, unusual; foreign; surprising 戊 - 5th heavenly stem 二 - two; twice 烯 - alkene