NCC=CC(=O)O mol32394 0_1 [NH3+]CC=CC(=O)[O-] mol32394 0_2 [NH3+]CC=CC(=O)O mol32394 1_1 NCC=CC(O)=[OH+] mol32394 1_2 NCC=CC(=O)[O-] mol32394 -1_1