G. D. Krapivin, V. G. Kul'nevich and N. I. Val'ter; 2,2-Dimethyl-5-(5-r-2-furfurylidene)-1,3-dioxan-4,6-diones. 1. Synthesis, properties, and structure; Chemistry of Heterocyclic Compounds (New York, NY, United States); English; 22; 10; 1986; 1072 - 1075;
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