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method of obtaining a mixture of phthalic and maleic ангидридов and 5.6 - хризенхинона of хризена and mixture 3,10 - 3.8 - пиренхинонов of pyrene
method of obtaining a mixture of phthalic and maleic ангидридов and 5.6 - хризенхинона of хризена and mixture 3,10 - 3.8 - пиренхинонов of pyrene