[1,3]oxazines

A compound of formula I,

• wherein
• R1 is aryl or heteroaryl, each substituted by 1-4 substituents individually selected from halogen-C2-6-alkenyl, halogen-C2-6-alkynyl, C1-6-alkoxy-C2-6-alkenyl, C1-6-alkoxy-C2-6-alkynyl, C2-6-alkenyl-C1-6-alkoxy and C2-6-alkynyl-C1-6-alkoxy;
• R2 is halogen;
• R3 is C1-6-alkyl;
• R4 is selected from the group consisting of
• i) hydrogen,
• ii) C1-6-alkyl, and
• iii) halogen;
• R5 is selected from the group consisting of
• i) hydrogen,
• ii) C1-6-alkyl, and
• iii) halogen;
• R6 is selected from the group consisting of
• i) hydrogen, and
• ii) C1-6-alkyl;
• R7 is selected from the group consisting of
• i) hydrogen, and
• ii) C1-6-alkyl;
• and when R1 is heteroaryl substituted by C2-6-alkynyl-C1-6-alkoxy, then R4 and R5 are both hydrogen or are both halogen;
• or pharmaceutically acceptable salts thereof.