Patent ID: 8552053

Claim:
A 3′-, 7-substituted-indirubin of formula (I) wherein R represents N—OH, N—O-alkyl, N—O—CO-alkyl, NO—(R a ) n1 -Het, N—O—(Y) n1 —NR a R b , or N—O—CO—N(R b , R c ), where R a and R b independently represent a CH 2 — group or a CH 3 — group, and R c represents a CH 3 — group, and Het represents an aliphatic nitrogeneous heterocycle, Y being an optionally substituted —CH 2 — radical, n1 being 1 to 3, and X is an halogen atom selected in the group comprising F, Cl, Br, and I, and Z is H or CH 3 , or a salt thereof.