You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S)-3-[[(2S)-2-[[(2S)-4-amino-2-[[(2S)-2-[[(2S,3S)-2-[[(2S,3R)-2-amino-3-hydroxybutanoyl]amino]-3-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-4-oxobutanoyl]amino]-3-hydroxypropanoyl]amino]-4-[[2-[[(2S,3R)-1-[[(2S)-1-[[(1S,2R)-1-carboxy-2-hydroxypropyl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-3-hydroxy-1-oxobutan-2-yl]amino]-2-oxoethyl]amino]-4-oxobutanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C45H68N12O19
assistant