1 4YU Methyl (2e)-4-{[(5-methoxy-1,2-dimethyl-1h-indol-3-yl)carbonyl]amino}but-2-enoate 1.000 2 FHH Methyl 4-[(2-oxidanylidene-1,5,6,7-tetrahydrocyclopenta[B]pyridin-3-yl)carbonylamino]butanoate 0.720