You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,5S,13R,17R)-10,17-dihydroxy-4-methyl-12-oxapentacyclo[9.6.1.01,13.05,17.07,18]octadeca-7(18),8,10-trien-14-one;(1S,5S,13R)-14-methoxy-4-methyl-12-oxapentacyclo[9.6.1.01,13.05,17.07,18]octadeca-7(18),8,10,14,16-pentaen-10-ol;(1S,5S,13R,17R)-4-methyl-12-oxapentacyclo[9.6.1.01,13.05,17.07,18]octadeca-7(18),8,10,15-tetraene-10,14,17-triol is the IUPAC name of a molecule. Please give its molecular formula.
user
C55H60O11
assistant