You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(NZ)-N-[(1S,3Z,4S,6S)-5,5,6-trimethyl-3-[(1R,4R,6S)-5,5,6-trimethyl-2-bicyclo[2.2.1]heptanylidene]-2-bicyclo[2.2.1]heptanylidene]hydroxylamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H31NO
assistant