You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (1S,2R,5R,6S,9S,10R,11R,13R,15R,16R,18S,19R,20S,22S,24S,25S,26R,28R,30S)-9-[2-[6-amino-2-(pyridin-4-ylmethylamino)purin-9-yl]ethylsulfanyl]-20-(dimethylamino)-19,25-dihydroxy-5-iodo-15,26-dimethoxy-2,6,11,13,15,26,30-heptamethyl-4,7,17,29,31,32-hexaoxapentacyclo[14.13.1.118,22.124,28.06,10]dotriacontane-3,8,12-trione .
user
C50H73IN8O13S
assistant