You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(9-oxapentacyclo[9.7.1.02,10.03,8.015,19]nonadeca-1(18),2(10),3,5,7,11(19),12,14,16-nonaen-14-yl)-4-phenyl-[1]benzothiolo[3,2-d]pyrimidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C34H18N2OS
assistant