CAS Chemical Name SMILES #Obs_CA_with_S9 #in vitro predicted CA with S9 Metabo Smiles Reference 52-89-1 L-Cysteine hydrochloride Cl_NC{P-}(CS)C(O)=O in vitro CA positive in vitro CA positive NC{P-}(CS)C(O)=O Danish EPA Inventory, Sofuni, T., Ed. (1998). Data Book of Chromosomal Aberration Test In Vitro, Revised Edition. Life-Science Information Center; Tokyo, Japan.