β-Isocomen,ein neues sesquiterpen aus Berkheya-arten

The investigation of several Berkheya species afforded in addition to already known compounds three unusual sesquiterpene hydrocarbons. Together with modhephene and isocomene, a new one is present, its structure being elucidated by spectroscopic methods and by some chemical transformations. All 18 species investigated contain the typical thiophene derivatives, isolated earlier; the patterns of compounds present divide the species into two groups.     

Ein neues germacren-derivat sowie ein diterpenmalonat aus Baccharis-arten

The investigation of the aerial part of B. scandens afforded a new ketone, a germacrene derivative. The aerial parts of B. tricuneata var. lineata yielded, in addition to known ent-clerodane derivatives, a malonate of a further diterpene of this type. The structures are elucidated by spectroscopic methods.     

Holocalin: Ein neues cyanogenes glykosid aus Holocalyx balansae

From seeds of Holocalyx balansae Mich. holocaline, a new cyanogenetic glycoside, has been isolated by chromatography on silica gel. Holocaline is enzymatically split by emulsin into glucose, HCN and m-hydroxybenzaldehyde. According to its optical rotation, it represents the hitherto unknown diastereomer of zierine.     

Ein neues sesquiterpenketon aus Arnica-arten

From the essential oil of the rhizomes and roots of five Arnica species a new sesquiterpene ketone with an unusual carbon skeleton has been isolated, its structure being elucidated by chemical and detailed spectroscopic investigation.     

Canarion,ein neues naphthochinon aus Usnea canariensis

The structure of canarione, a new naphthoquinone from the lichens Usnea canariensis and U. hookeri was elucidated by UV, ¹H-NMR, ¹³C-NMR, mass spectrometry, and chemical degradation as 5,8-dihydroxy-2-methyl-4H-naphtho [2,3b]-pyran-4,6,9 (6H, 9H)- trione.     

Isodidrovaltratum,ein neues valepotriat aus Valeriana vaginata

The isolation and structural elucidation of a new valepotriate, isodidrovaltrate, from Valeriana vaginata is reported.