You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 6-[2-[[3-[(E)-(1-ethyl-3,3-dimethyl-5-phosphonoindol-2-ylidene)methyl]-2,4-dioxocyclobutylidene]methyl]-3,3-dimethylindol-1-ium-1-yl]hexanoic acid ?
user
C34H40N2O7P+
assistant