You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 14-ethyl-1,10-dihydroxy-7-methyl-17-oxatetracyclo[8.7.0.02,8.011,16]heptadeca-2(8),4,6,11(16),12,14-hexaen-9-one using the IUPAC nomenclature.
user
C19H18O4
assistant