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 4-[9,18,18,27,27-pentakis(4,7-dihydroxynaphthalen-1-yl)-9-heptacyclo[18.7.0.02,10.03,8.011,19.012,17.021,26]heptacosa-1(20),2(10),3,5,7,11(19),12,14,16,21,23,25-dodecaenyl]naphthalene-1,6-diol .
user
C87H54O12
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