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11.发明授权
公开(公告)号：US3251834A
公开(公告)日：1966-05-17
申请号：US8052361
申请日：1961-01-04
Applicant: UPJOHN CO
Inventor： MARTIN DAVID G , PIKE JOHN E
CPC classification number: C07J71/00 , C07J5/00 , C07J21/00 , C07J75/00 , Y10S435/886
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