AIDS-105131 AIDS105131 Succ-D-E-Mef-Bgl-L-Abu-B(OH)2 Valinamide, N-(3-carboxy-1-oxopropyl)-L-.alpha.-aspartyl-L-.alpha.-glutamyl-3-methyl-L-phenylalanyl-N~1~-[(1S)-3-amino-3-borono-1-(2-methylpropyl)-2-oxo-5-hexenyl]-3-methyl-