Abstract

The glycosidase-inhibiting pyrrolidine alkaloids (2 R,3 R,4 R,5 R)-2,5-dihydroxymethyl-3,4-dihydroxypyrrolidine (DMDP), 2,5-dideoxy-2,5-imino- dl- glycero- d- manno-heptitol (homoDMDP), homoDMDP-7- O-apioside and 1,4-dideoxy-1,4-imino- d-arabinitol have been identified in the leaves of bluebells ( Hyacinthoides non-scripta). HomoDMDP and homoDMDP-7- O-apioside are new natural products. Glycosidase inhibition by the aglycones is compared and could explain the symptoms of poisoning of livestock by bluebells.

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