Composition #1: LANZETTA, R., LAMA, G., MAURIELLO, G., PARRILLI, M., RACIOPPI, R., SODANO, G. ICHTHYOTOXIC SESQUITERPENES AND XANTHANOLIDES FROM DITTRICHIA-GRAVEOLENS. PHYTOCHEMISTRY, 1991, vol. 30, no. 4, p. 1121–1124. DOI: 10.1016/S0031-9422(00)95185-9.
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