4,5,15,16-Tetraphenyl-10-(2,4,6-triphenyl-1.lambda.~5~-pyridin-1-yl)-3,6,14,17-tetraoxa-23-azatricyclo[17.3.1.1~8,12~]tetracosa-1(23),8(24),9,11,19,21-hexaen-24-ol AIDS-146607 AIDS146607 NSC674178