4-Chloro­phenyl 2-oxo-2H-chromene-3-carboxyl­ate

In title compound, C₁₆H₉ClO₄, the coumarin ring system is approximately planar [maximum deviation = 0.056 (1) Å] and is oriented with respect to the benzene ring at an angle of 22.60 (7)°. Inter­molecular C—H...O hydrogen bonding is present in the crystal.

Oosporein from Tremella fuciformis

The title compound [systematic name: 3,3′,6,6′-tetra­hydroxy-4,4′-dimethyl-1,1′-bi(cyclo­hexa-3,6-diene)-2,2′,5,5′-tetra­one], C₁₄H₁₀O₈, was isolated from Tremella fuciformis. The mol­ecule has 2 symmetry, with the mid-point of the C—C bond linking the cyclo­hexa­dienedione rings located on a twofold rotation axis. In the mol­ecule, the ring is approximately planar, with an r.m.s. deviation of 0.0093 Å, and the two rings make a dihedral angle of 67.89 (5)°. Inter­molecular O—H...O hydrogen bonding occurs in the crystal structure.

Trehalose dihydrate from Tremella fuciformis

The title compound, C₁₂H₂₂O₁₁·2H₂O {systematic name: 6,6′-oxybis[2-(hy­droxy­meth­yl)-3,4,5,6-tetra­hydro-2H-pyran-3,4,5-triol] dihydrate}, is a disaccharide, which was isolated from Tremella fuciformis. The mol­ecule contains two six-membered rings, both of which adopt a chair conformation. Extensive O—H...O hydrogen bonds occur in the crystal structure.