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公开(公告)号：US2891051A
公开(公告)日：1959-06-16
申请号：US64902257
申请日：1957-03-28
Applicant: PFIZER & CO C
Inventor： CELMER WALTER D , KENNETH KOE BILLIE
IPC: C07H17/075
CPC classification number: C07H17/075
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