A compound of formula (I), for use in the treatment of non-traumatic acquired brain injury,in which M represents a NR1R2 group, an OR1 group or a SR1 group, A represents a NR4R5 group, an OR10 group or a
hydrogen atom, R3 is a (C1-C6)
alkyl group, a (C1-C6)cycloalkyl group, an
aryl group, a —CH2-
aryl group, a CH2-(C1-C6)cycloalkyl group or a —CH2-heteroaryl group, and its addition salts with pharmaceutically acceptable acids. A compound of formula (I) wherein R5 is a (C1-C8)
alkyl group or a (C1-C6)cycloalkyl group, said
alkyl and cycloalkyl group being substituted with one, two or three —OCORa group(s).