You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (11S)-16,18-dimethyl-15-(2-methyl-1,3-benzoxazol-6-yl)tetracyclo[9.7.0.03,8.012,16]octadeca-1(18),2,14-triene-5,11-diol .
user
C28H33NO3
assistant