You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,3S,6S,7R,10S,11R)-3,12-dimethyl-7-[(4-phenylpiperazin-1-ium-1-yl)methyl]-2,9-dioxatetracyclo[9.3.0.01,3.06,10]tetradec-12-en-8-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H33N2O3+
assistant