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 11-bromo-N-[2-[[(2R,3R,4R,5R,6S)-2-[(1S)-1,2-dihydroxyethyl]-4,5-dihydroxy-6-(7H-purin-6-ylamino)oxan-3-yl]amino]-2-oxoethyl]undecanamide ?
user
C25H40BrN7O7
assistant