You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S,3S)-8-amino-3-[4-(2,5-dimethylphenyl)piperazin-1-yl]-7-nitro-1,2,3,4-tetrahydronaphthalen-2-ol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H28N4O3
assistant