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 (3S,4R)-4-ethyl-3-(2-fluoroethyl)-2-(4-hydroxyphenyl)-3,4-dihydro-2H-chromen-6-ol using the IUPAC nomenclature.
user
C19H21FO3
assistant