176589-08-5 AIDS-006021 AIDS006021 Cbz-Phe- .psi.[(R,R)-trans-epoxide]Gly-Val L-Valine, N-[N-[[3-[2-phenyl-1-[[(phenylmethoxy)carbonyl]amino]ethyl]oxiranyl]acetyl]glycyl]-, [2R-[2a,3b(S*)]]-