Patent · US Active

Crystalline form and B crystalline form of pyrazine-2(1H)-ketone compound and preparation method thereof

US11603366B2 · kind B2 · utility

0Cited by

6References

15Claims

0Family size

Assignee

ZHANGZHOU PIEN TZE HUANG PHARMACEUTICAL CO., LTD. · CN

Inventors

Juan Yu · Fujian, CN
Fei Hong · San Diego, US
Tingting Yin · Fujian, CN
Zhiliang Chen · Shanghai, CN
Yichao Zhuang · Zhangzhou, CN
Zhifei Fu · Shanghai, CN
Miaorong Luo · Shanghai, CN
Yang Zhang · San Diego, US
Jian Li · Shanghai, CN
Shuhui CHEN · Shanghai, CN

Key dates

Filing date	Aug 4, 2020
Grant date	Mar 14, 2023
Priority date	—
Expiry date	Aug 4, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07B2200/13
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Provided are crystalline forms of pyrazine-2(1H)-ketone compound and a preparation method thereof; specifically disclosed are a method for preparing the compound of formula (II) and crystalline forms thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.