You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methylpropyl 4-(40-phenyl-40-heptadecacyclo[9.7.7.719,25.413,17.321,23.111,12.03,31.05,30.07,28.09,26.015,37.020,36.022,38.024,39.027,33.029,34.032,35]tetraconta-3(31),5,7(28),9,13(39),15(37),17,20(36),21(35),22(38),23(33),24,26,29(34)-tetradecaenyl)butanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C54H38O2
assistant