You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (1R,2R,4S,12R,13S,16R,19R)-8-[di(propan-2-yl)amino]-2,19-dihydroxy-5,5,12-trimethyl-17-methylidene-9-thia-7-azapentacyclo[14.2.1.01,13.04,12.06,10]nonadeca-6(10),7-dien-18-one .
user
C27H40N2O3S
assistant