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 2-[[(4aS,7R,7aR)-9-hydroxy-4a-methoxy-3-methyl-1,2,4,5,6,7,7a,13-octahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-7-yl]amino]acetic acid;dihydrochloride .
user
C20H28Cl2N2O5
assistant