c1ccc(cc1)c2nc(c(c(n2)N)CN)c3ccc4c(c3)OCO4 50995 IC50 = 10000 nM 20091 8 P28843 Dipeptidyl peptidase IV c1ccc(cc1)c2cc(c(c(n2)N)CN)c3ccc4c(c3)OCO4 205174 IC50 = 47000 nM 20091 8 P28843 Dipeptidyl peptidase IV c1ccnc(c1)C(=O)[C@@H]2CCCN2C(=O)[C@@H]3C[C@@H]4CCCC[C@@H]4N3 549036 IC50 = 2000 nM 20091 8 P28843 Dipeptidyl peptidase IV c1cscc1C(=O)[C@@H]2CCCN2C(=O)[C@@H]3C[C@@H]4CCCC[C@@H]4N3 549037 IC50 = 50000 nM 20091 8 P28843 Dipeptidyl peptidase IV c1csc(n1)C(=O)C2CCCN2C(=O)[C@@H](C3CCCCC3)N 310745 IC50 = 1000 nM 20091 8 P28843 Dipeptidyl peptidase IV