You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2,6,7,8-tetramethyl-2-[(4R,8R)-4,8,12-trimethyltridecyl]-3,4-dihydrochromene-5-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H49NO
assistant