1,5,7,11-Tetrahydroxymethyl-3,9-dimethoxycarbonyl-6,12-bis(4-methoxyphenyl)-3,9-diazahexacyclo[6.4.0.02.7.04.11.05.10]dodecane AIDS-087922 AIDS087922 Cage dimeric 4-aryl-1,4-dihydropyridine deriv.