3,9-Dibenzyl-1,5,7,11-tetrahydroxymethyl-6,12-diphenyl-3,9-diazahexacyclo[6.4.0.0(2.7).0(4.11).0(5.10)]dodecane AIDS-087953 AIDS087953 Cage dimeric 4-aryl-1,4-dihydropyridine deriv. H 17 H17