3,9-Di-tert-butyloxycarbonyl-1,5,7,11-tetrahydroxymethyl-6,12-diphenyl-3,9-diazahexacyclo[6.4.0.02.7.04.11.05.10]dodecane AIDS-087925 AIDS087925 Cage dimeric 4-aryl-1,4-dihydropyridine deriv.