You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (5S)-6'-oxospiro[7,8-dihydro-[1,3]dioxolo[4,5-g]isoquinoline-5,7'-furo[3,2-g][1,3]benzodioxole]-6-carbaldehyde by IUPAC nomenclature, provide its molecular formula.
user
C19H13NO7
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