{TAIL ~ The invention} also relates to methods for isolating {HEAD ~ the compounds} from herbivorous insect oral secretions and to chemically synthesizing the compounds and their active derivatives 
{ TAIL ~ The invention } also relates to methods for isolating { HEAD ~ the compounds } from herbivorous insect oral secretions and to chemically synthesizing the compounds and their active derivatives
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH