Start with a benzene ring numbered 1-6 clockwise.

- C2 and C5 each carry a fluorine substituent.

- C3 carries a methoxy group (-OCH3).

- C4 carries an isobutyl group: the ring carbon is bonded to a methylene (-CH2-), which is bonded to a secondary carbon bearing two methyl groups (i.e., -CH2-CH(CH3)2).

- C1 and C6 are unsubstituted and bear hydrogen.

There are no chiral centers and no double-bond stereochemical issues to specify.