You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (19E,21E,25E,27Z,29E,31E)-34-(4-amino-3,5-dihydroxy-6-methyloxan-2-yl)oxy-1,3,4,7,9,11,17,37-octahydroxy-15,16,18-trimethyl-13-oxo-14,39-dioxabicyclo[33.3.1]nonatriaconta-19,21,25,27,29,31-hexaene-36-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
user
C47H75NO17
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