Antimicrobial tetraprenyltoluquinol derivatives from Cystoseira spinosa var. Squarrosa

Six new tetraprenyltoluquinol derivatives have been isolated from the brown alga Cystoseira spinosa var. squarrosa and their structures determined by chemical and spectral methods. Three of these compounds possess antimicrobial activity against both gram-positive and gram-negative bacteria. © 1988.