CN Patent

CN87101864A — 吡唑并[3，4-d]嘧啶衍生物及其生产和用途

Assigned to Takeda Pharmaceutical Co Ltd · Expires 1987-11-18 · 38y expired

What this patent protects

式(I)代表的新型吡唑并[3，4-d]嘧啶衍生物及其盐能刺激脑机能及代谢过程。式(I)中，R 1 为可被取代的芳基或杂环芳基；R 2 为低级烷基；R 3 及R 4 各自独立地代表氢或低级烷基；R 5 为氢、低级烷基或低级酰基，它连在吡唑环的1或2位上；X为可含有杂原子的低级亚烷基；虚线表示吡唑环中存在的两个双键。

USPTO Abstract

式(I)代表的新型吡唑并[3，4-d]嘧啶衍生物及其盐能刺激脑机能及代谢过程。式(I)中，R 1 为可被取代的芳基或杂环芳基；R 2 为低级烷基；R 3 及R 4 各自独立地代表氢或低级烷基；R 5 为氢、低级烷基或低级酰基，它连在吡唑环的1或2位上；X为可含有杂原子的低级亚烷基；虚线表示吡唑环中存在的两个双键。

Drugs covered by this patent

Patent Metadata

Patent number
CN87101864A
Jurisdiction
CN
Classification
—
Expires
1987-11-18
Drug substance claim
No
Drug product claim
No
Assignee
Takeda Pharmaceutical Co Ltd
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

Track this patent

Get a daily-checked alert when vulnerability score, expiry, classification, or assignee changes. Email, Slack, or Teams delivery. Pro: 50 watches, Free: 3.