You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[[4-[(2-amino-4-oxo-3H-pteridin-6-yl)methylamino]benzoyl]amino]-5-[[(3R,4R,5S,6R)-1-[[(2S)-4-carboxy-1-oxo-1-[[(3R,4R,5S,6R)-4,5,6,7-tetrahydroxy-1-oxo-1-[[(2S)-1-oxo-1-[[(2R,3R,4S,5R)-3,4,5,6-tetrahydroxyhexan-2-yl]amino]hept-5-yn-2-yl]amino]heptan-3-yl]amino]butan-2-yl]amino]-4,5,6,7-tetrahydroxy-1-oxoheptan-3-yl]amino]-5-oxopentanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C51H74N12O23
assistant