Dianthramides A and B, two N-benzoylanthranilic acid derivatives from elicited tissues of Dianthus caryophyllus

Abstract Two new phenolic derivatives, dianthramide A and B, were isolated from Dianthus caryophyllus tissues elicited with mycelial extracts of Phytophthora parasitica . The purified substances were identified on the basis of their spectral data and were characterized as N -salicyl-4-methoxyanthranilic acid (dianthramide A) and N -salicyl-4-hydroxyanthranilic acid methyl ester (dianthramide B). Dianthramides A and B co-occur in carnation tissues with the known phytoalexin dianthalexin.