Core skeleton: 2,3-dihydro-1-benzofuran. This consists of a furan ring (five-membered, one oxygen) fused to a benzene ring, with the oxygen positioned adjacent to the benzene.

Numbering the ring atoms anticlockwise as follows: O1 (furan oxygen); C2 (saturated carbon adjacent to O1); C3 (next ring carbon); 3a (fused junction); C4, C5, C6, C7 (benzene carbons in sequence); and 7a (second fused junction).

Substituents on the fused core:
1. At C-2, a 2-amino-ethyl group -CH2-CH2-NH2 is attached.
2. At C-5, a fluorine atom is attached.
3. At C-7, a phenyl ring is attached that carries two fluorine substituents, positioned ortho and meta to the linkage point to the core skeleton; the two fluorine atoms are para to each other.