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