141397-59-3 Dthp-ornithine L-Ornithine, N2-(4-(((2-amino-1,4,5,6,7,8-hexahydro-4-oxopyrido(2,3-d)pyrimidin-6-yl)methyl)amino)benzoyl)- N(alpha)-(5-Deaza-5,6,7,8-tetrahydropteroyl)ornithine