A mitotic kinesin Eg5 inhibitor which comprises a thiadiazoline derivative represented by the general formula (I) or a pharmacologically acceptable salt thereof as an active ingredient:
[wherein R
1
represents a hydrogen atom and the like, R
2
represents a hydrogen atom, —C(═W)R
6
(wherein W represents an oxygen atom or a sulfur atom, and R
6
represents substituted or unsubstituted lower alkyl and the like) and the like, R
3
represents —C(═Z)R
19
(wherein Z represents an oxygen atom or a sulfur atom, and R
19
represents substituted or unsubstituted lower alkyl and the like) and the like, R
4
represents substituted or unsubstituted lower alkyl and the like, and R
5
represents substituted or unsubstituted aryl and the like] and the like are provided.
一种有丝分裂动力蛋白Eg5
抑制剂,该
抑制剂包括由通式(I)所表示的
噻二唑衍
生物或其药学上可接受的盐作为活性成分:[其中R1表示氢原子等,R2表示氢原子,-C(═W)R6(其中W表示氧原子或
硫原子,R6表示取代或未取代的低碳基等)等,R3表示-C(═Z)R19(其中Z表示氧原子或
硫原子,R19表示取代或未取代的低碳基等)等,R4表示取代或未取代的低碳基等,R5表示取代或未取代的芳基等]等。