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 6-(4-benzo[c]carbazol-7-yl-6-phenylpyrimidin-2-yl)-14-phenyl-3-thia-15-azapentacyclo[11.8.0.02,10.04,9.016,21]henicosa-1(13),2(10),4(9),5,7,11,14,16,18,20-decaene .
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C51H30N4S
assistant