You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,2R,7R,8R,9R,11R,14R,15R)-16-(4-azidobutyl)-8-[(2S)-4-(dimethylamino)-3,6-dimethyloxan-2-yl]oxy-2-ethyl-5-fluoro-9-methoxy-1,5,7,9,11,13,14-heptamethyl-3,18-dioxa-13,16-diazabicyclo[13.3.0]octadecane-4,6,17-trione;(1S,2R,5R,7R,8R,9R,11R,14R,15R)-16-(4-azidobutyl)-8-[(2S)-4-(dimethylamino)-3,6-dimethyloxan-2-yl]oxy-2-ethyl-9-methoxy-1,5,7,9,11,14-hexamethyl-3,18-dioxa-13,16-diazabicyclo[13.3.0]octadecane-4,6,17-trione is the IUPAC name of a molecule. Please give its molecular formula.
user
C73H129FN12O16
assistant