Carbamoyl tetrahydropyridine derivatives

A carbamoyl tetrahydropyridine derivative represented by the formula:

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• [in the formula, R1 and R2 are identical or different, and each represents a hydrogen atom, a C1-C5 alkyl group, or a phenyl group, or alternatively, R1 and R2, taken together with the nitrogen atom to which they are adjacent, represent a 5- to 8-membered and saturated heterocyclic group represented by the formula:
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• (in the formula, A represents CH2, NH, N—(C1-C5 alkyl), O or S);
• R3 represents a hydrogen atom or a C1-C5 alkyl group;
• Y1—Y2 represents (R4)C═C(R5), (R6)C═N, N═N, (R7)N—CO, or N═C(R8);
• X1, X2, and X3 are identical or different, and each represents a hydrogen atom, a halogen atom, a C1-C5 alkyl group, a C1-C5 alkoxy group, a C1-C5 alkylthio group, a trifluoromethyl group, a trifluoromethoxy group, an amino group, or a C1-C5 alkylamino group;
• wherein R4 and R5 are identical or different, and each represents a hydrogen atom or a C1-C5 alkyl group;
• R6 represents a hydrogen atom or a C1-C5alkyl group;
• R7 represents a hydrogen atom, a C1-C5 alkyl group, a (C1-C5 alkoxy)carbonylmethyl group, a carboxymethyl group, or a group represented by the formula:
• CH2CONR11(R12) (in the formula, R11 and R12 are identical or different, and each represents a hydrogen atom or a C1-C5 alkyl group, or alternatively, R11 and R12, taken together with the nitrogen atom to which they are adjacent, represent a 5- to 8-membered and saturated heterocyclic group represented by the formula:
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• (in the formula, B represents CH2, NH, N—(C1-C5 alkyl), O or S);
• and R8 represents a hydrogen atom or a carbamoyl group], or a pharmaceutically acceptable salt thereof.