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Amino acid loss with polyethersulfone.
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Supramolecular constructs and thermodynamic stability of four polymorphs and a co-crystal of pentobarbital (nembutal)
The complex polymorphic system of the title compound, 5-ethyl,5-(1-methylbutyl)barbituric acid (Nbtl), is a key system for the general understanding of the molecular aggregation in barbiturates. TheExpand
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Barbiturates with hydrogen-bonded layer and framework structures
Four N–H⋯OC bonded structures for 5,5-substituted derivatives of barbituric acid are reported, which are distinct from the eight fundamental types that have been previously described. TheExpand
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5,5-Dihydroxybarbituric acid 1,4-dioxane hemisolvate
TLDR
The asymmetric unit of the title compound,, C4H4N2O5·0.5C4H8O2, contains one molecule of 5,5-dihydroxybarbituric acid with a nearly planar barbiturate ring and half a molecule of 1,4-dioxane. Expand
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Tetragonal polymorph of 5,5-dichlorobarbituric acid
TLDR
The tetragonal polymorph of 5,5-dichlorobarbituric acid (m.p. 478 K), C4H2Cl2N2O3, forms an N—H⋯O hydrogen-bonded tape structure along [001]. Expand
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Butallylonal 1,4-dioxane hemisolvate
TLDR
The asymmetric unit of the title compound [systematic name: 5-(1-bromoprop-2-en-1-yl)-5-sec-butylpyrimidine-2,4,6-trione 1,4-dioxane hemisolvate], C11H15BrN2O3·0.5C4H8O2, contains one half-molecule of 1, dioxane. Expand
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Two polymorphs and the diethylammonium salt of the barbiturate eldoral.
Polymorph (Ia) of eldoral [5-ethyl-5-(piperidin-1-yl)barbituric acid or 5-ethyl-5-(piperidin-1-yl)-1,3-diazinane-2,4,6-trione], C(11)H(17)N(3)O(3), displays a hydrogen-bonded layer structure parallelExpand
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