Abstract: The present invention relates to a compound represented by formula I and a non-toxic pharmaceutically acceptable salt thereof. In formula (I), R1 is H, CH3 or deuterated methyl (CD3); R2 is CH3 or CH2CH3; R3, R4 and R5 are each independently H or deuterium (D); when R1 is H or CH3, at least one of R3, R4 and R5 is D.
Type:
Grant
Filed:
January 26, 2018
Date of Patent:
September 1, 2020
Assignee:
TAIZHOU HUAYUAN MEDICINAL TECH CO. LTD.
Inventors:
Bohua Zhong, Jianming Wang, Jiajun Yang