Raltegravir Standard

N-[(4-Fluorophenyl)methyl]-1,6-dihydro-5-hydroxy-1-methyl-2-[1-methyl-1-[[(5-methyl-1,3,4-oxadiazol-2-yl)carbonyl]amino]ethyl]-6-oxo-4-pyrimidinecarboxamide;5-Hydroxy-2-[1-[[(5-Methyl-1,3,4-oxadiazol-2-yl)carbonyl]amino]-1-methylethyl]-N-(4-fluorobenzyl)-1-methyl-6-oxo-1,6-dihydropyrimidine-4-carboxamide; N-(4-Fluorobenzyl)-5-hydroxy-1-methyl-2-[1-methyl-1-[[(5-methyl-1,3,4-oxadiazol-2-yl)carbonyl]amino]ethyl]-6-oxo-1,6-dihydropyrimidine-4-carboxamide;