Patent ID: 11945798
Assignee: YUHAN CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC A  C | IPC C

Claim 1:
2. The compound of claim 1, or a pharmaceutically acceptable salt thereof,
wherein
R1 is C1-3 alkyl optionally substituted by one to three substituents selected from the group consisting of OH, F, Cl, C3-6 cycloalkyl, —NHC1-3 alkyl, and N(C1-3 alkyl)2; C1-2 alkoxy; —C(O)—C1-3 alkyl, optionally substituted by one to three substituents selected from the group consisting of F, and Cl, —NHC1-3 alkyl, —N(C1-3 alkyl)2, and 4-7 membered heterocyclyl having one to three heteroatoms selected from a group consisting of N, O and S; —C(O)—C3-6 cycloalkyl, optionally substituted by one to three substituents selected from the group consisting of OH and halogen; —C(O)phenyl optionally substituted by one to three F, or Cl; —C(O)-5-6 membered heteroaryl optionally substituted by one to three F, Br, Cl or I; —N(C1-3 alkyl)2; —NHC(O)C1-3 alkyl; —NHC(O)C3-6 cycloalkyl, optionally substituted by one to three substituents selected from the group consisting of OH, F, Br, Cl and I; —C(O)NHC1-3 alkyl optionally substituted by one to three substituents selected from the group consisting of OH, F and Cl; —C(O)NHC3-6 cycloalkyl optionally substituted by one or more substituents selected from the group consisting of OH, F, Br, Cl, I and —N(C1-3 alkyl)2; —C(O)-3-7 membered heterocyclyl optionally substituted by one to three substituents selected from the group consisting of OH, F, Cl, C1-6 alkyl, and C1-6 hydroxyalkyl; or 4-7 membered heterocyclyl.