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US 11,993,561 B2Granted
Expectorant compound, preparation method thereof and use thereof
AssigneeHc Synthetic Pharmaceutical Co., Ltd.
InventorsCheng Yang, Sumin Qi, Qiyuan Zhang, Dongxing Li, Tieshan Chen, Xiaodan Zhao
Life of this patent
Estimating the term…
Abstract
The present disclosure discloses an expectorant compound, and specifically discloses compounds represented by formula I and formula II, pharmaceutically acceptable salts or tautomers thereof.
Claims18
A compound represented by formula I, or a pharmaceutically acceptable salt or tautomer thereof;
- wherein R1 represents H, F, Cl, Br or NH2;
- R2 represents H, F, Cl or Br;
- R3 represents H, F, Cl, Br or NH2;
- R4 represents H, F, Cl or Br;
- R5 represents H, F, Cl or Br;
- R6 represents H or CH3;
- and R7 represents
- and
- wherein not all of R1, R2, R3, R4, and R5 are hydrogen.
6 more elements
A compound represented by formula II, pharmaceutically acceptable salt or tautomer thereof;
- wherein X represents
- or amino acid salts thereof.
Dependencies are inferred from the claim text.