You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,9R,12S,13R,14R,17R,18E,21S,23S,24R,25R,27R)-17-ethyl-1,14-dihydroxy-12-[(E)-1-[(1R,3R,4S)-4-hydroxy-3-methoxycyclohexyl]prop-1-en-2-yl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetrone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C43H69NO12
assistant