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 2,4,10-trimethyl-3-selanylidene-1,2,4,5,7,10-hexaza-3lambda5-phosphatricyclo[3.3.1.13,7]decane ?
user
C6H15N6PSe
assistant