3-[N-(5-Benzylpyrrole-2-carbonyl)-L-alaninyl]amino-4-oxobutanoic acid (36b), was prepared (41%) from 35b by the method described for compound 36a, to afford an off white solid: mp. 109°-112° C.; [α]D25 +6.3° (c 0.3, methanol); IR (KBr) 3368, 1724, 1630, 1530, 1453, 1414, 1233, 1049; 1H NMR(d4 methanol) δ 7.25-7.11 (5H, m), 6.76 (1H, d, J=3.5), 5.84 (1H, d, J=3.5), 4.51 (1H, m), 4.43 (1H, q, J=7.1), 4.23 (1H, m), 2.5 (2H, m),1.35 (3H, d, J=7.0). Anal. Calcd for C19H21N3O5.1.75 H2O: C, 56.64; H, 6.13; N, 10.43. Found: C, 56.34; H, 5.72; N, 10.00. ##STR128##
