You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[9-[(1R,6R,7R,9R,14S,15R,19R,20R)-19-(6-benzamidopurin-9-yl)-12,20-dihydroxy-4-oxo-12-sulfanylidene-3,5,8,11,13,16,18-heptaoxa-12lambda5-phospha-4-phosphoniatetracyclo[13.2.2.16,9.01,14]icosan-7-yl]purin-6-yl]benzamide into molecular formula.
user
C35H31N10O12P2S+
assistant