You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (8R)-6-amino-8-(3-chloro-5-methoxy-4-prop-2-ynoxyphenyl)-8H-[1,3]dioxolo[4,5-g]chromene-7-carbonitrile is given. What is its corresponding molecular formula?
user
C21H15ClN2O5
assistant