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(4R,12aS)-3,4,6,8,12,12a-hexahydro-7-methoxy-4-methyl-6,8-dioxo-2H-Pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid CAS No.1335210-34-8 / Cat No.EBD3333112
(4R,12aS)-3,4,6,8,12,12a-hexahydro-7-methoxy-4-methyl-6,8-dioxo-2H-Pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid
(4R,12aS)-3,4,6,8,12,12a-hexahydro-7-methoxy-4-methyl-6,8-dioxo-2H-Pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid
(4R,12aS)-7-Methoxy-4-Methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-[1,3]oxazino[3,2-d]pyrido[1,2-a]pyrazine-9-carboxylic acid