Benzoxazines for use in the treatment of disease Parkison.

A compound of Formula I ** (Formula) ** or a pharmaceutically acceptable salt thereof, wherein R1 is C1-C6 alkyl, C2-C6, or phenyl (CH2) n; R2 is C3-C6 alkyl; R3 is hydrogen, halo, hydroxy, O-C1-C6 alkyl, or S-C1-C6 alkyl; R4 is hydrogen, C1-C6 alkyl, or phenyl (CH2) n; and N is an integer from 0 to 3.