You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl 6-oxo-5-(phosphanylamino)-1,2,3,4,5,8,9,10-octahydropyrazolo[1,2-a][1,2,5]triazocine-8-carboxylate into its molecular formula.
user
C11H21N4O3P
assistant