L -(+)-(S)-Canavanine is a non-proteinogenic amino acid found in certain leguminous plants. It is structurally related to the proteinogenic α-amino acid L -arginine, the sole difference being the replacement of a methylene bridge (\sCH2\s unit) in arginine with an oxa group (i.e., an oxygen atom) in canavanine.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.