156719-41-4 L-Ornithine, N5-(imino(methylthio)methyl)- L-S-Methylthiocitrulline N(delta)-(S-Methylisothioureido)norvaline N5-(Imino(methylthio)methyl)-L-ornithine S-Me-TC S-Methyl-L-thiocitrulline S-Methylthiocitrulline