You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 3-[(2S,5S,8S,11S,14S,17S,20S,23S,26S)-5-(2-amino-2-oxoethyl)-14-(3-amino-3-oxopropyl)-11-[(2S)-butan-2-yl]-17-[3-(carbamoylamino)propyl]-20,23-bis(2-carboxyethyl)-26-methyl-8-(2-methylsulfanylethyl)-3,6,9,12,15,18,21,24,27-nonaoxo-1,4,7,10,13,16,19,22,25-nonazacycloheptacos-2-yl]propanoic acid ?
user
C44H71N13O18S
assistant