L-cysteine thioether felinine (-)-felinine (2R)-2-amino-3-[(4-hydroxy-2-methylbutan-2-yl)sulfanyl]propanoic acid 207.093 207.29152 A cysteine thioether that is the S-(4-hydroxy-2-methylbutan-2-yl) derivative of L-cysteine. It is a major component of the urine of the domestic cat. Beilstein:2250979 C8H17NO3S CAS:471-09-0 CC(C)(CCO)SC[C@H](N)C(O)=O CHEBI:39390 IFERABFGYYJODC-LURJTMIESA-N InChI=1S/C8H17NO3S/c1-8(2,3-4-10)13-5-6(9)7(11)12/h6,10H,3-5,9H2,1-2H3,(H,11,12)/t6-/m0/s1 PMID:13093671 PMID:8590373 PMID:9811369 Reaxys:2250979 S-(3-hydroxy-1,1-dimethylpropyl)-L-cysteine S-(4-hydroxy-2-methylbutan-2-yl)-L-cysteine chebi_ontology non-proteinogenic L-alpha-amino acid