134121-41-8 2H-Pyrido(4,3-e)-1,3-oxazin-2-one, 3,4-dihydro-4-hydroxy-8-methyl-5-((phosphonooxy)methyl)- 4'-Carbamoylpyridoxal 5'-phosphate CPLP Carbamoylpyridoxal 5'-phosphate