Fungal alkaloids

The number of natural products containing these tricyclic systems is relatively small, viz. a few alkaloids from marine (compound 293), fungal (compound 282), amphibian (compound 395), insect (compound 387), and plant sources (compound 288) and also some iridoid molecules (compounds 98-100). Some of those Myrmkaria alkaloids (from ants Section 12.16.6.5.2) which contain the 5 5 6 fused-ring system are perhaps the most extensively studied of these natural products, with several successful syntheses now recorded. 

Finally, Part III also includes two reviews (Chapters 17 and 19) of the relative risks and novel strategies available to reduce mycotoxin and enteric pathogen contamination in organic crop production systems, for mycotoxin and fungal alkaloid contamination in organic and conventional production systems (Chapter 17) and for the microbiological safety of fruit and vegetables (Chapter 19). 

Strategies to reduce mycotoxin and fungal alkaloid contamination in organic and conventional cereal production systems... 

Biotransformations of morphinan alkaloids have been reported for plant, fungal, and mammalian enzymatic systems with emphasis on rather specific reactions such as the reduction of ketones, N- and O-demethylation, and perox-idative transformations. Furuya et al. used immobilized tissue culture cells of Papaver somniferum to accomplish the selective reduction of codeinone (135) to codeine (136) (207) (Scheme 30). Suspension cultures of a well-established cell line of P. somniferum were grown for one week as a source of cell mass for immobilization in calcium alginate. The cells continued to live in the alginate matrix for 6 months maintaining their biological activity. The reduction of co-... 

Fungal polysaccharides, 20 455, 577-578 Fungi. See also Soil fungi alkaloids in, 2 75... 

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