You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named potassium;2-(2-oxo-6-tricyclo[9.4.0.03,8]pentadeca-1(15),3(8),4,6,9,11,13-heptaenyl)propanoate is given. What is its corresponding molecular formula?
user
C18H13KO3
assistant