. . . "bergapten" . . . . . . "Bergaptene" . . . "Heraclin" . "Bergapten" . . . . . . . . . . "4-Methoxy-7H-furo[3,2-g][1]benzopyran-7-one" . . . . "Majudin" . "Bergapten" . "5-Methoxypsoralen" .