Patent ID: 6838558

Claim:
A compound of formula wherein: R 1 is selected from the group consisting of —H, —NO 2 , —CN, -halogen, -lower alkyl which is straight-chained and which optionally may be substituted by the group consisting of —OH and halogen, —OR 5 , —R 6 —OR 7 , —COOR 7 , —CONR 8 R 9 , —NR 10 R 11 , —NHCOR 12 , and —NHSO 2 R 13 ; R 2 and R 4 are each independently selected from the group consisting of —H, -halogen, —NO 2 , —CF 3 , and —straight chained lower alkyl; R 5 is selected from lower alkyl which optionally may be substituted by halogen; R 6 is selected from —(CH 2 ) 1-6 —; R 7 is selected from the group consisting of —H and lower alkyl; R 8 and R 9 are each independently selected from the group consisting of —H and -lower alkyl which itself optionally may be substituted by —OH and —NH 2 ; alternatively, R 8 and R 9 may form a 5- or 6-membered heterocycle which optionally may be substituted by the group consisting of —OH, —NH 2 , and lower alkyl; R 10 , R 11 and R 12 are each independently selected from the group consisting of —H and lower alkyl; R 13 is selected from the group consisting of lower alkyl which optionally may be substituted by the group consisting of halogen and —NR 14 R 15 ; and R 14 and R 15 are each independently selected from the group consisting of —H and lower alkyl which optionally may be substituted halogen, or alternatively, —NR 14 R 15 is a heterocycle.