1,6-Dinaphth-2-yl-2(S),5(S)-di[N-{2(S)-N[[N(methyl)-N(pyrid-2ylmethyl)amino]carbonyl]amino-3(S)-methylpentanoyl]amino]-3,4-cis-epoxyhexane AIDS-105767 AIDS105767 Cis-Epoxide deriv.