Patent · US Active

Crystal form D of pyrazine-2(1H)-ketone compound and preparation method therefor

US11597722B2 · kind B2 · utility

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0References

9Claims

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Assignee

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

Inventors

Zhiliang Chen · Shanghai, CN
Zhiyi Luo · Zhangzhou, CN
Yichao Zhuang · Zhangzhou, CN
Jinxia Lin · Zhangzhou, CN
Longhui Gao · 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 7, 2023
Priority date	—
Expiry date	Aug 4, 2040

Classification

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

Abstract

The present invention disclosed a crystal form of pyrazine-2(1H)-ketone compound and a preparation method therefor. Specifically disclosed is a method for preparing a compound of formula (II) and a crystal form thereof.

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