You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[2-(2-phenyl-1,3-oxazolidin-3-yl)ethyl]-3-(4,4,6,6-tetramethyl-2-methylideneheptyl)pyrrole-2,5-diol by IUPAC nomenclature, provide its molecular formula.
user
C27H40N2O3
assistant