Koetjapic acid chloroform hemisolvate

Koetjapic acid chloro­form hemisolvate

The asymmetric unit of the title compound, C(30)H(46)O(4)·0.5CHCl(3), consists of one koetjapic acid [systematic name: (3R,4aR,4bS,7S,8S,10bS,12aS)-7-(2-carboxy-ethyl)-3,4b,7,10b,12a-penta-methyl-8-(prop-1-en-2-yl)-1,2,3,4,4a,4b,5,6,7,8,9,10,10b,11,12,12a-hexa-deca-hydro-chrysene-3-carboxylic acid] mol-ecule and one half-mol-ecule of chloro-form solvent, which is disordered about a twofold rota...

5,5-Dihydroxy­barbituric acid 1,4-dioxane hemisolvate

The asymmetric unit of the title compound,, C(4)H(4)N(2)O(5)·0.5C(4)H(8)O(2), contains one molecule of 5,5-dihydroxybarbituric acid with a nearly planar barbiturate ring and half a molecule of 1,4-dioxane. The geometry of the centrosymmetric dioxane molecule is close to an ideal chair conformation. The crystal structure exhibits a complex three-dimensional hydrogen-bonded network. Barbiturate m...

5-Methyl­spiro­[indoline-3,7′-[6H,7H,8H]pyrano[3,2-c:5,6-c′]di[1]benzopyran]-2,6′,8′-trione chloroform hemisolvate

In the title compound, C(27)H(15)NO(6)·0.5CHCl(3), the central pyran ring and both the benzopyran systems are planar, with the dihedral angle between the outer rings being 3.24 (6)°. The indolin-2-one system is in a perpendicular configuration with respect to the pyran ring [dihedral angle = 87.58 (2)°]. Supra-molecular layers in the ac plane are formed in the crystal structure whereby inversio...

Chloroform

It was perhaps fitting that Lieut.-Colonel Edward Lawrie, should signalise the year of his retirement from the post of R,esidenc\r Surgeon at Hyderabad by the publication of a volume on Chloroform, a subject with which he has been identified for many years past, and in defence of his views on which, and those of his master Syme, he has fought non sine gloria for many }7ears. The introduction to...

Chloroform