1,6-Dihydroxy-3-hydroxymethyl-8-methoxyanthracene-9,10-dione monohydrate

1,6-Dihydr­oxy-3-hydroxy­methyl-8-methoxy­anthracene-9,10-dione monohydrate

The title compound, C(16)H(12)O(6)·H(2)O, isolated from the halotolerant fungus Aspergillus variecolor B-17, is also known as questinol monohydrate. In the crystal structure, O-H⋯O hydrogen bonds link the mol-ecules, forming a three-dimensional network. π-π stacking inter-actions consolidate the supra-molecular structure [the shortest inter-planar distances are 3.456 (3), 3.366 (4) and 3.382 (4...

3-Ethyl-3-hy­droxy-8-meth­oxy­quinoline-2,4(1H,3H)-dione monohydrate

In the title hydrate, C(12)H(13)NO(4)·H(2)O, the piperidine ring that is fused to the benzene ring is in a sofa conformation with the chiral C atom lying 0.4084 (18) Å out of the plane of the nine fused-ring atoms. In the crystal, O-H⋯O and N-H⋯O hydrogen bonds link the organic mol-ecules and water mol-ecules into chains running along the b-axis direction. The chains are further connected into ...

Foreword Introduction 4 , 5 - Dihydroxy - 1 , 3 - Bis ( Hydroxymethyl ) Imidazolidin - 2 - One Cas N ° : 1854 - 26 - 8

5-(4-Hy­droxy-3-meth­oxy­benz­yl)-1,3-thia­zolidine-2,4-dione monohydrate

In the title compound, C(11)H(11)NO(4)S·H(2)O, the five-membered thia-zolidine ring is nearly planar, with a maximum deviation of 0.010 (2) Å. The dihedral angle between the thia-zolidine and benzene rings is 49.16 (9)°. Inter-molecular O-H⋯O and N-H⋯O hydrogen bonding is present in the crystal structure.

5-Isopropyl­imidazolidine-2,4-dione monohydrate

In the title compound, C(6)H(10)N(2)O(2)·H(2)O, the imidazole ring is essentially planar, with a maximum deviation of 0.012 (2) Å. In the crystal, mol-ecules are connected via N-H⋯O and O-H⋯O hydrogen bonds, forming a supra-molecular tape along the a axis.