Isolation of flavomannin-6,6′-dimethyl ether and one of its racemates from higher fungi

Occurrence of 7,7′-biphyscion in Japanese soils

“…These results are consistent with the spectral data of 7,7'-biphyscion (BP: Fig. 1) Steglich et al 1972). The ~H NMR-spectrum of the acetylated product of the pigment was also identical with the reported NMR-spectrum for BP tetra-acetate ).…”

“…3. BP has so far been isolated from two higher fungi, Dermocybe cinnarnomeolutea and Tricholorna equestre Steglich et al 1972). It is well known that the latter and related species (Tricholornataceae) are widely distributed in Japan.…”

Wild-Mushroom Intoxication as a Cause of Rhabdomyolysis

“…The yellow pigment of T. equestre, 7,7' bi-physcion, has been identified. 20,21 However, since this pigment is minimally soluble in water, we think it is unlikely to be the toxic compound. Since all extracts of T. equestre were toxic to mice, inducing increases in creatine kinase levels, the toxic compound appears to be extracted equally well by water and chloroform-methanol.…”

Pigment pattern of the Chilean mushroom Dermocybe nahuelbutensis Garrido & E. Horak

“…Some of the NMR signals could not be detected, presumably due to a hindered rotation around the biaryl axis resulting in severe signal broadening. Therefore, the proposed structure was verified by dehydration and alkaline oxidation of flavomannin C (5) according literature [23], which yielded 7,7'-emodinphyscion (1).…”

“…(1) Compound 1, 7,7'-emodinphyscion, was isolated as a yellow amorphous powder, for which the UV spectrum showed λ max at 200, 285, 440, 461 nm and in combination with the bathochromic shift after adding NaOH to λ max at 287, 522 nm indicating its anthraquinonic nature. Its molecular formula was determined as C 31 [23], compound 1 was established as a new bisanthraquinone named 7,7'-emodinphyscion (Fig. 1).…”