Plant poisonings are a major problem for livestock producers. The majority of these
episodes are due to alkaloid constituents, encompassing numerous plant species. Reviews …

The alkaloid germine hasbeen shown to have structure and configuration I. Alkaline
isomerization of I leads to iso-germine (XI) and thence to pseudogermine (XII). Acetic …

Approaches are described to the synthesis of a series of isotopically labelled L-α-amino
acids each with an asymmetric centre at C-3, including isoleucine, allo-isoleucine, threonine …

The absolute configuration of the α-methylbutyryl residue in (4R, 5S, 7S, 8S, 9S, 10R, 11R, 2
″S)-7-angeloyloxy-9-hydroxy-8-(α-methylbutyryloxy)-longipin-2-en-l-one and (4R, 5S, 7S …

The enantiomeric compositions of 2-methylbutanol (1), 4-methylhexanol (2), 2-
methylbutanoic acid (3), and 4-methylhexanoic acid (4) present in rhubarb (Rheum …

抄録 Detailed examinations were made of nitrous acid deaminations of L-valine and its
benzyl ester in acetic acid. These showed that while the substitution product is the only …

The structures of protoveratrine A and protoveratrine B have been elucidated. Protoveratrine
A is protoverine 3-{d)-2'-hydroxy-2'-methylbutyrate 6, 7-diacetate 15-(Z)-2'-methylbutyrate …

Publisher Summary This chapter discusses that many of the alkaloids from Veratrum,
Zygadenus and related genera are based on the cevane structure. The chemical reactions …

Azo dyes have played an important role in the development of the chemical industry for 150
years. The azo‐core of these dyes can undergo trans to cis photoisomerization, which …

Alkindiazoate wurden durch Spaltung der entsprechenden Nitrosoharnstoffe oder
Nitrosocarbamidsäureester mit Methanol/Methylat erzeugt. Bei Alkindiazoaten mit …