2-O-(3-Hydroxyhexadecanoyl)glycerol and 2-O-(3-hydroxytetradecanoyl)glycerol and their 1-O-acetyl derivatives from the glandular trichome exudate of Verbascum blattaria f. erubescens

Chemical investigation of the glandular trichome exudate of Verbascum blattaria f. erubescens (Scrophulariaceae) led to the isolation of four new glycerides, 1-O-acetyl-2-O-[(R)-3-hydroxytetradecanoyl]-sn-glycerol, 1-O-acetyl-2-O-[(R)-3-hydroxyhexadecanoyl]-sn-glycerol, 2-O-[(R)-3-hydroxytetradecanoyl]glycerol and 2-O-[(R)-3-hydroxyhexadecanoyl]glycerol. Their structures, including the configurations at the stereogenic centres, were elucidated from spectral evidence and chemical transformations.