1.5.1.25 4.4 - DELTA1-piperideine 2-carboxylate pH 7.2, 37°C 743354 1.5.1.25 6.6 - DELTA1-pyrrolidine 2-carboxylate pH 7.2, 37°C 743354 1.5.1.25 1.7 - DELTA2-thiazoline-2-carboxylate pH 7.2, 37°C 743354 1.5.1.25 0.2 - S-(2-aminoethyl)-L-cysteine ketimine pH 7.2, 37°C 743354