Parmelia entotheiochroa

Deriv Hopan-16p,22-diol, mp 268 °C, [a]i, + 68 (CHCI3), by saponification of 16P-aceto-xyhopan-22-ol with KOH-MeOH StL Parmelia entotheiochroa Hue Lit Yosioka et al. 1966c... 

Yosioka I, Yamaki M, Kitagawa I (1966c) On the triterpenic constituents of a lichen Parmelia entotheiochroa Hue zeorin, leucotylin, leucotylic acid, and five new related triterpenoids. Chem Pharm Bull 14 804-807... 

The structures of the pigments secalonic acid A and secalonic acid C, isolated from the lichens Parmelia entotheiochroa (340) and Cetraria ornata (346), have been revised (166). On the basis of further spectral evidence secalonic acids A and C were formulated as the 4,4 -dimers (180) and (181) rather than the 2,2 -derivatives originally proposed. 

Parmelia crenata, 428 Parmelia ecuadoriensis, 19 Parmelia encausta, 360 Parmelia entotheiochroa, 513, 515 Parmelia exasperatula, 39, 467, 468, 489 Parmelia furfuracea, 267 Parmelia glabratula, 455,467 Parmelia laciniatula, 106 Parmelia leucotyliza, 515... 

For the investigation of ergochrome biosynthesis, microorganisms were required which produce ergochromes steadily and which accept labeled precursors efficiently. Lichens as Parmelia entotheiochroa, which grow extremely... 

Leucotylic acid (98), phlebic acid A (99), and phlebic acid B (100) are hopane derivatives with a 23-carboxylic acid from Parmelia leucotyliza yl., P. entotheiochroa Hue, and Peltigera aphthosa (L.) Willd. Diacetyl pyxinol (101), known from Pyxine endochrysina yX., possesses adammaran skeleton from X-ray analysis of 3/3, 12/3-di-/ -bromobenzoyl pyxinol. 

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