leucine leucine leucinium InChI=1S/C6H13NO2/c1-4(2)3-5(7)6(8)9/h4-5H,3,7H2,1-2H3,(H,8,9)/p+1 leucinium +1 ROHFNLRQFUQHCH-UHFFFAOYSA-O leucine cation CHEBI:32628 CC(C)CC([NH3+])C(O)=O 132.18090 An alpha-amino-acid cation that is the conjugate acid of leucine, arising from protonation of the amino group. chebi_ontology C6H14NO2 132.10191 Gmelin:1651836 1-carboxy-3-methylbutan-1-aminium H2leu(+) alpha-amino-acid cation