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公开(公告)号：US2520097A
公开(公告)日：1950-08-22
申请号：US75196847
申请日：1947-06-02
Applicant: SHELL DEV
Inventor： HEARNE GEORGE W , BUIS VERNON W
IPC: C07D213/12
CPC classification number: C07D213/12
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