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 ethyl 2-[(1R,11bR)-11-benzyl-1-hydroxy-11b-methyl-2,3,5,6-tetrahydroindolizino[8,7-b]indol-1-yl]acetate .
user
C26H30N2O3
assistant