Pityrogramma calomelanos

Asai, F. et al., Five complex flavonoids in the farinose exudate of Pityrogramma calomelanos. Phytochemistry, 31, 2487, 1992. 

Calomelanol G C25H20O7 432 Pityrogramma calomelanos Adiantaceae, Pteridophyta Frond 173... 

The farinose exudate of the frond of the fern Pityrogramma calomelanos (Adiantaceae) has been the source of complex flavonoids characterized by a novel Ce-Cs-Ce-Cs-Ce skeleton (Table 15.7). This group includes four flavanones, calomelanols G (238), H (239), I (240), and J (241) (Figure 15.10). In these compounds, a molecule of p-coumaric or cinnamic acid appears to be fused with the A-ring of the flavanone. Biosynthetic pathways for these complex flavanones and related flavones, chalcones, and dihydrochalcones in P. calomelanos and other Pityrogramma species have been proposed by the authors. 

Adiantum alenlicum, A. bellum. A. capillus-veneris, A. cauda-tum, A. coccinum, A. cunealum. A. flabellatum, A. pedalum, A. formosamun, Adiantum spp. (2), Pityrogramma calomelanos. Adiartlum philippense was positive (1/2). 

Francesconi, K., Visoottiviseth, R, Sridokchan, W., and Goessler, W. 2002. Arsenic species in an arsenic hyperaccumulating fern, Pityrogramma calomelanos A potential phytoremediator of arsenic-contaminated soils. The Science of the Total Environment, 284(l-3) 27-35. 

Wongkongkatep, J., Parkpian, P., Polprasert, C., Supaibulwatana, K., lida, T., and Fukushi, K. 2004. Phytoremediation of arsenic by Pityrogramma calomelanos Do synthetic chelating agents increase or decrease arsenic phytoextraction efficiency Annual Report of Interdisciplinary Research Institute of Environmental Sciences, 22 61-72. 

The structure of calomelanolactone (337), a co-metabolite of pterosin Z (338) in Pityrogramma calomelanos ( silver fern ), has been determined by X-ray crystallographic analysis. ... 

Pityrogramma calomelanos var. aureoflava Weath. ( = P. austroamericana Domin) 139... 

T rihydroxy-4 -methoxy-chalcone (Neosakuranetin) Pityrogramma calomelanos Link var. calomelanos C16H14O5 amor- phous 139... 

Dihydrocinnamoyl-5,7-dihydroxy- Pityrogramma calomelanos Link C24H20O5 65.5 and 185 ... 

Bohm, B.A. Phenolic Compounds in Fems-II. Indirect Evidence for the Existence of 2, 6 -Dihydroxy-4,4 -dimethoxychalcone in Pityrogramma calomelanos. Phytochem. 7, 1687 (1968). 

Wagner, H., O. Seligmann, M.V. Chari, E. Wollenweber, V.H. Dietz, D.M.X. Donnelly, M.J. Meegan, and B. O Donnell Strukturell neuartige 4-Phenylbenzo-pyran-2-one aus Pityrogramma calomelanos (L.) Link. Tetrahedron Letters 1979, 4269. 

Donnelly, D.M.X., N. Fukuda, E. Wollenweber, J. Polonsky, and T. Prange A Dihydrocinnamoyl Neoflavanoid from Pityrogramma calomelanos. Phytochem. 26,1143 (1987). 

Favre-Bonvin, J., M. Jay, E. Wollenweber, and V.H. Dietz Deux flavones ex-traites d un exsudat de fougere Pityrogramma calomelanos var. aureoflava). Phytochem. 19, 2043 (1980). 

Bardouille, V., B.S. Mootoo, K. Hirotsu, and J. Clardy Sesquiterpenes from Pityrogramma calomelanos. Phytochem. 17, 275 (1978). 

---