134805-81-5 AIDS-051254 AIDS051254 Bis(2-PyAc-Val-Phe-.psi.-[CHOH]) L-Iditol, 1,2,5,6-tetradeoxy-2,5-bis[[3-methyl-1-oxo-2-[(2-pyridinylacetyl)amino]butyl]amino]-1,6-diphenyl-, [2(S),5(S)]-