You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-N-[[(3aS,4S,9S,10aS)-2,6-diamino-9-[(4,4-dimethyl-2,3-dihydrochromene-8-carbonyl)amino]-10,10-dihydroxy-3a,4,8,9-tetrahydro-1H-pyrrolo[1,2-c]purin-4-yl]methyl]pyrrolidine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H37N9O5
assistant