You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,4R,14S,18R)-14-[[(3S)-3-[[benzenesulfonyl(methyl)amino]methyl]-4,4-dimethylpentanoyl]amino]-18-[7-methoxy-2-[2-(propan-2-ylamino)-1,3-thiazol-4-yl]quinolin-4-yl]oxy-2,15-dioxo-3,16-diazatricyclo[14.3.0.04,6]nonadec-7-ene-4-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C49H63N7O9S2
assistant