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 (3R)-3-[2,3-dihydroxy-4-methoxy-5-(2-methylbut-3-en-2-yl)phenyl]-7-hydroxy-2,3-dihydrochromen-4-one .
user
C21H22O6
assistant