(4R,12aS)-N-(2,4-difluorobenzyl)-7-hydroxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxamide,CAS No.: 1256810-42-0 This substance is used in the production of industrial chemicals. It serves as an intermediate in various chemical synthesis processes, contributing to the manufacture of a wide range of products.