You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[2-[(21E)-30-[5-(dimethylamino)-4-hydroxy-4,6-dimethyloxan-2-yl]oxy-9,52-dihydroxy-18-(1-hydroxyethyl)-21-(1-methoxyethylidene)-16,19,26,31,42,46-hexaoxo-32,43,54-trioxa-3,13,23,49-tetrathia-7,17,20,27,45,51,52,55,56,57-decazadecacyclo[26.16.6.229,40.12,5.112,15.122,25.138,41.147,50.06,11.034,39]heptapentaconta-2(57),4,6,8,10,12(56),14,22(55),24,34(39),35,37,40,47,50-pentadecaen-8-yl]-1,3-thiazole-4-carbonyl]piperazin-1-yl]-N,N-dimethylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C66H71N15O18S5
assistant