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 2-[(5S,11S,14R)-11-[3-(diaminomethylideneamino)propyl]-14-ethyl-12-methyl-4,7,10,13,16-pentaoxo-3,6,9,12,15-pentazabicyclo[15.3.1]henicosa-1(21),17,19-trien-5-yl]acetic acid;methanesulfonic acid ?
user
C26H40N8O10S
assistant