(2S)-2-amino-3-cyanopropanoic acid (2S)-2-amino-3-cyano-propanoic acid (2S)-2-amino-3-cyano-propionic acid 6232-19-5 CHEBI:16934 C9650_SIGMA beta-Cyano-L-alanine 3-Cyano-L-alanine C02512 L-3-Cyanoalanine L-beta-Cyanoalanine ZINC00901380