diethyl -1,5-dibenzyl-1,5,8,8b-tetrahydro-4a,8a-dihydroxymethyl-4,8-diphenyl-cyclobuta(1,2b,3,4b')dipyridine-3,7(4H,4bH)dicarboxylate
diethyl -1,5-dibenzyl-1,5,8,8b-tetrahydro-4a,8a-dihydroxymethyl-4,8-diphenyl-cyclobuta(1,2b,3,4b')dipyridine-3,7(4h,4bh)dicarboxylate