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 19-(1-phenylbenzo[f]quinazolin-3-yl)-12-thia-19-azaheptacyclo[15.11.0.02,14.05,13.06,11.018,26.020,25]octacosa-1(17),2(14),3,5(13),6,8,10,15,18(26),20,22,24,27-tridecaene .
user
C44H25N3S
assistant