Li, Xianghui Self-complementary quadruply hydrogen-bonded duplexes based on imide and urea units. [electronic resource] - Organic letters Sep 2011 - 4628-31 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1523-7052 Standard No.: 10.1021/ol2018455 doi Subjects--Topical Terms: Crystallography, X-RayHydrogen BondingImides--chemistryModels, MolecularMolecular StructureStereoisomerismUrea--chemistry