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