You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4S,7S,11aS)-2-acetyl-7-benzamido-N-(2-ethoxy-5-oxooxolan-3-yl)-6-oxo-3,4,7,8,9,10,11,11a-octahydro-1H-pyrazino[1,2-a]azocine-4-carboxamide;(4S,7S,11aS)-2-acetyl-7-benzamido-6-oxo-3,4,7,8,9,10,11,11a-octahydro-1H-pyrazino[1,2-a]azocine-4-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C46H59N7O12
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