SEARCH Articles Figures Tables Biogenetic isoprene rule Isoprene rule, basis Isoprene-rule diterpenes Ruzicka, isoprene rule Terpenes The Isoprene Rule Terpenes and isoprene rule Terpenes and the Isoprene Rule Terpenes isoprene rule Terpenoid isoprene rule and The Isoprene Rule