title: Coumarins of Heracleum canescens and Heracleum pinnatum. Sources for dermal photosensitizing agents.
mesh_terms: D003374:Coumarins / Q000009:adverse effects / Q000302:isolation & purification*; D006801:Humans; D010787:Photosensitivity Disorders / Q000139:chemically induced; D010946:Plants, Medicinal / Q000032:analysis*
chemical_list: D003374:Coumarins