You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-amino-5-[(2S)-1-[[(1S,5R,13R,17R)-17-hydroxy-10-methoxy-12-oxapentacyclo[9.6.1.01,13.05,17.07,18]octadeca-7(18),8,10,14-tetraen-14-yl]oxy]-1-oxopropan-2-yl]oxy-5-oxopentanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H31NO9
assistant