You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[3,4-dihydroxy-5-(1-hydroxyethyl)oxolan-2-yl]-1-hydroxy-8-(hydroxymethyl)-10,12-dimethoxynaphtho[1,2-c]isochromen-6-one .
user
C26H26O10
assistant