I-Citrulline iyi-L-enantiomer ye-citrulline.Inendima njenge-EC 1.14.13.39 (nitric oxide synthase) inhibitor, i-ejenti evikelayo, i-nutraceutical, i-micronutrient, i-metabolite yomuntu, i-Escherichia coli metabolite, i-Saccharomyces cerevisiae metabolite kanye ne-metabolite yegundane.I-enantiomer ye-D-citrulline.Kuyi-tautomer ye-L-citrulline zwitterion.