You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R,15S,17S,18S,19E,21E,23E,25E,27E,29E,31E,33R,35S,37S)-33-[(2S,3R,4S,5S)-4-amino-3,5-dihydroxyoxan-2-yl]oxy-N-cyclobutyl-1,3,5,6,9,11,17,37-octahydroxy-15,18-dimethyl-13-oxo-14,39-dioxabicyclo[33.3.1]nonatriaconta-19,21,23,25,27,29,31-heptaene-36-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C49H76N2O16
assistant