The process 1 in which {HEAD ~ the base} employed in the hydrolysis of the Diels Alder adduct is {TAIL ~ an alkali metal} hydroxide 
is
The process 1 in which { HEAD ~ the base } employed in the hydrolysis of the Diels Alder adduct is { TAIL ~ an alkali metal } hydroxide
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH