Four Novel Dihydroisocoumarin (=3,4‐Dihydro‐1 H ‐2‐benzopyran‐1‐one) Glucosides from the Fungus Cephalosporium sp. AL031

Four novel dihydroisocoumarin (=3,4‐dihydro‐1 H ‐2‐benzopyran‐1‐one) glucosides were isolated from a culture broth of a strain of the fungus Cephalosporium sp. AL031. Their structures were elucidated as (2 E ,4 E )‐5‐[(3 S )‐5‐acetyl‐8‐( β ‐ D ‐glucopyranosyloxy)‐3,4‐dihydro‐6‐hydroxy‐1‐oxo‐1 H ‐2‐benzopyran‐3‐yl]penta‐2,4‐dienal ( 1 ), (2 E ,4 E )‐5‐[(3 S )‐5‐acetyl‐8‐( β ‐ D ‐glucopyranosyloxy)‐3,4‐dihydro‐6‐methoxy‐1‐oxo‐1 H ‐2‐benzopyran‐3‐yl]penta‐2,4‐dienal ( 2 ), (3 S )‐8‐( β ‐ D ‐glucopyranosyloxy)‐3‐[(1 E ,3 E ,5 E )‐hepta‐1,3,5‐trienyl]‐3,4‐dihydro‐6‐hydroxy‐5‐methyl‐1 H ‐2‐benzopyran‐1‐one ( 3 ), and (3 S )‐8‐[(6‐ O ‐acetyl‐ β ‐ D ‐glucopyranosyl)oxy]‐3‐[(1 E ,3 E ,5 E )‐hepta‐1,3,5‐trienyl]‐3,4‐dihydro‐6‐methoxy‐5‐methyl‐1 H ‐2‐benzopyran‐1‐one ( 4 ) by spectroscopic methods, including 2D‐NMR techniques and chemical methods.