Discovery of sugarnitriles A and B, and structural reassignment of SF-2140, from a sugarcane endophytic actinomycete Amycolatopsis sp. JS-O27
Three rare cyano-substituted indole N-glycosides, SF-2140 (1) and its two previously undescribed derivatives, sugarnitriles A (2) and B (3), were isolated from a sugarcane endophytic actinomycete Amycolatopsis sp. JS-O27. The planar structures of 1–3 were established by HRESIMS data and detailed 1D/2D NMR spectroscopic...