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 15,15,39,39-tetramethyl-18,36-diphenoxy-25,29,42-triphenyl-12-selena-25,29,42-triaza-1,5-diboratridecacyclo[28.18.1.15,13.02,28.04,26.06,11.014,22.016,21.032,40.033,38.041,49.043,48.024,50]pentaconta-2,4(26),6,8,10,13,16(21),17,19,22,24(50),27,30(49),31,33(38),34,36,40,43,45,47-henicosaene .
user
C78H55B2N3O2Se
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