You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4R,4aR,5aS,12aS)-9-[2-(cyclohexen-1-yl)ethynyl]-4-(dimethylamino)-7-ethyl-1,10,11,12a-tetrahydroxy-3,12-dioxo-4a,5,5a,6-tetrahydro-4H-tetracene-2-carboxamide into its molecular formula.
user
C31H34N2O7
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