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system
Provide the molecular formula for the IUPAC named substance (4S)-7-acetyl-4-benzhydryl-9-butoxy-3,4-dihydro-2H-pyrido[1,2-a]pyrazine-1,8-dione;(4S)-4-benzhydryl-9-butoxy-3,4-dihydro-2H-pyrido[1,2-a]pyrazine-1,8-dione;(4S)-4-benzhydryl-9-butoxy-1,8-dioxo-3,4-dihydro-2H-pyrido[1,2-a]pyrazine-7-carboxylic acid;(4S)-4-benzhydryl-9-butoxy-2-methyl-3,4-dihydropyrido[1,2-a]pyrazine-1,8-dione;(4S)-4-benzhydryl-9-hydroxy-2-methyl-3,4-dihydropyrido[1,2-a]pyrazine-1,8-dione .
user
C126H128N10O18
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