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 4-N,4-N,6-N,6-N-tetramethyl-2,2-dipyridin-4-yloxy-1,3,5-triaza-2lambda5-phosphacyclohexa-1,3,5-triene-4,6-diamine .
user
C16H20N7O2P
assistant