Patent ID: 6951883

Claim:
A 2H-1-benzopyran of general formula: wherein R 1 and R 2 are independently H, alkyl, haloalkyl, alkenyl or haloalkenyl, or, when they are alkyl, together with the nitrogen atom they are bound to, they can form a 4- to 8-membered heterocyclic ring; X is H, alkyl, aryl, nitro, halo, or O—R 3 wherein R 3 is H, alkyl, aryl, alkanoyl, or aryloyl; X 1 is H, alkyl or alkoxy and when X and X 1 are alkyl they can form, together with the carbon atoms they are bound to, a fused aromatic ring to give an α-naphthalenyl; Y is H, alkyl, alkanoyl, aryloyl, alkylaminocarbonyl, or alkyloxycarbonyl; Z is H, or O—R 4 wherein R 4 is H, alkyl, alkanoyl, or aryloyl; m is 1, 2; n is 0, 1; p is 2-6; and represents a single or double bond between the atoms in positions 3-4 or 4-4a; when n is 1 the double-bond may be alternatively exocyclic or endocyclic to give respectively a 4-benzylidenechroman for m=1 or a 4-benzyl-chrom-3-ene for m=2; when n is 0, represents a single or double band between the atomi in position 3-4, and represents a single or double bond between the atoms in positions 3-4, and Z is not H; or a pharmaceutically acceptable salts thereof.