摘要:
The present invention concerns novel compounds having the structure (I). Another object of the invention is the use of compounds (I) for the fabrication of a medicament which is used for the treatment of tumour diseases.
摘要:
Compound of formula (I): wherein: n represents 0 or 1, R1 represents hydrogen, arylalkyl, alkyl, acyl, alkoxycarbonyl, arylalkoxycarbonyl or trifluoroacetyl, R2 represents alkyl, X represents oxygen, chlorine, OR3, SR4 or NOR5, R3 represents hydrogen, alkyl, acyl, alkoxycarbonyl or arylalkoxycarbonyl, R4 represents hydrogen, alkyl or aryl, R5 represents hydrogen or optionally substituted alkyl, represents a single or double bond, Ar represents aryl or heteroaryl, its isomers and addition salts thereof with a pharmaceutically acceptable acid, and medicinal products containing the same which are useful as facilitators of memory and cognition and antalgic agents.
摘要:
Compound of formula (I): wherein: n represents 0 or 1, R1 represents hydrogen, arylalkyl, alkyl, acyl, alkoxycarbonyl, arylalkoxycarbonyl or trifluoroacetyl, R2 represents alkyl, X represents oxygen, chlorine, OR3, SR4 or NOR5, R3 represents hydrogen , alkyl, acyl, alkoxycarbonyl or arylalkoxycarbonyl, R4 represents hydrogen, alkyl or aryl, R5 represents hydrogen or optionally substituted alkyl, represents a single or double bond, Ar represents aryl or heteroaryl, its isomers and addition salts thereof with a pharmaceutically acceptable acid, and medicinal products containing the same which are useful as facilitators of memory and cognition and antalgic agents.
摘要:
To modify the longitudinal pitch distribution of a diffraction grating, longitudinal dimensional variation is imparted, over time, to a support along the entire length of a line on which said support carries, at least indirectly, a succession of diffraction elements of the grating. By way of example, the support is an auxiliary part on which an optical fiber is stuck, said fiber including said grating. An elongation coefficient dl/l represents the local relative value of dimensional variation. This value varies along said line. The invention is particularly applicable to making variable pitch light-refracting filters in optical fiber telecommunications systems.