Patent ID: 11919923
Assignee: SHANGHAI INSTITUTE OF MATERIA MEDICA, CHINESE ACADEMY OF SCIENCES
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  A  Y | IPC A  C

Claim 5:
6. The compound of formula (I) of claim 1, or the pharmaceutically acceptable salts thereof, wherein:
R8 is deuterium;
R2 is OR3 or C1-6alkoxy;
R3 is selected from the group consisting of hydrogen, formyl, acetyl, propionyl, butyryl, isobutyryl, valeroyl, pivaloyl, and hexanoyl; and
R5 is selected from the group consisting of formyl, acetyl, propionyl, butyryl, isobutyryl, valeroyl, pivaloyl, and hexanoyl.