Cyrus J. Ohnmacht, Jr. [a], Clyde W. Draper. Synthesis and Carbon-13 NMR Study of 2-Benzyl, 2-Methyl, 2-Aryloctahydropyrrolo[3,4-c]pyrroles and the 1,2,3,5-Tetrahydropyrrolo[3,4-c]pyrrole Ring System // J. Heterocycl. Chem.; 40; 6; 2003; 989 - 994
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