SEARCH Articles Figures Tables Lactones structure Sesquiterpene Sesquiterpene lactone Sesquiterpene lactone structure Sesquiterpene lactone structure Sesquiterpene lactones Sesquiterpene lactones structural diversity Sesquiterpene lactones structural types Sesquiterpene lactones structure activity relationships Sesquiterpenes Sesquiterpenes structures Sesquiterpens