(5S,6S,4R,7R)-1-[(3-Amino(1H-indazol-5-yl))methyl]-4,7-bisbenzyl-5,6-dihydroxy-3-(2-naphthylmethyl)-1,3-diazaperhydroepin-2-one AIDS-070227 AIDS070227 Cyclic urea deriv.