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 (1S)-2,21-dioxapentacyclo[11.8.0.01,10.03,8.015,20]henicosa-3,5,7,9,15,17,19-heptaene using the IUPAC nomenclature.
user
C19H16O2
assistant