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198470-92-7(base)丨Parecoxib Impurity 52

198470-92-7(base)丨Parecoxib Impurity 52...

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1448355-87-0丨Parecoxib Impurity 49

1448355-87-0丨Parecoxib Impurity 49...

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181695-84-1丨Parecoxib Impurity 43

181695-84-1丨Parecoxib Impurity 43...

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477594-28-8丨Parecoxib Impurity 46

477594-28-8丨Parecoxib Impurity 46...

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473465-11-1丨Parecoxib Impurity 42

473465-11-1丨Parecoxib Impurity 42...

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