You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-(4-methoxyphenyl)-1-[[3-(3-methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-4aH-thieno[3,2-d]pyrimidin-1-ium-2,4-dione .
user
C23H19N4O5S+
assistant