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1989-05-25
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1989-07-19
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1989-08-16
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1989-09-07
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1990-05-15
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1989-07-14
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1988-09-15
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1988-05-16
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1990-01-12
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1989-06-13
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1989-09-12
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1987-11-14
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1987-09-15
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1990-01-15
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1990-07-12
Salts of cyclobutanesulphonic acids and method of their preparation
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1990-01-15
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1988-10-14
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1988-07-15
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1988-11-15
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1987-02-16
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1989-10-13
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