You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please identify the SMILES representation of the molecule named 17-(4a,9a-dimethyl-1,2,3,4-tetrahydrocarbazol-9-yl)-4-tert-butyl-8-(4-tert-butyl-2-phenylphenyl)-14-dibenzothiophen-4-yl-11-methyl-8,14-diaza-1-borapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2(7),3,5,9(21),10,12,15(20),16,18-nonaene .
user
CC1=CC2=C3B(C4=CC(C(C)(C)C)=CC=C4N2C2=CC=C(C(C)(C)C)C=C2C2=CC=CC=C2)C2=CC=C(N4C5=CC=CC=C5C5(C)CCCCC45C)C=C2N(C2=CC=CC4=C2SC2=CC=CC=C24)C3=C1
assistant