You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (1R,3R,6S,8R,9S,12S,16R,18R,19S,21R)-3-(2-amino-1,2-dihydropyridin-5-yl)-9-[(1R)-1-[(1S,2R,3S,7R,8R,10R,13S)-3,7-dihydroxy-13-propyl-9-oxatricyclo[8.5.0.02,8]pentadecan-7-yl]-1-hydroxyethyl]-12,18,19-trihydroxy-14-[[(2S)-2-hydroxypropyl]amino]-8-methylpentacyclo[11.7.1.01,16.06,21.08,12]henicosa-4,13-dien-15-one ?
user
C49H75N3O9
assistant