(1S,2S)-2-[(1S)-1-amino-2-hydroxy-2-oxoethyl]cyclopropane-1-carboxylic acid (1S,2S)-2-[(1S)-1-amino-2-hydroxy-2-oxo-ethyl]cyclopropane-1-carboxylic acid (1S,2S)-2-[(1S)-1-amino-2-hydroxy-2-oxoethyl]-1-cyclopropanecarboxylic acid (1S,2S)-2-[(1S)-1-amino-2-hydroxy-2-keto-ethyl]cyclopropane-1-carboxylic acid Lopac0_000374 EU-0100374 NCGC00024541-04 (2S,1′S,2′S)-2-(Carboxycyclopropyl)glycine C237_SIGMA L-CCG-1 L-CCG-I