Abstract From the bark of Lunasia arnara B LANCO var. refmnda (L AUTERB. et K. S CHUMM) L AUTERB.(New Guinea) were isolated apart from the known Rutaceae alkaloids hydroxylunidine (I), hydroxylunacridine (II), lunacrine (111) and lunacridine (IV) two new crystalline alkaloids. One of these differs from I only by the absence of the tertiary hydroxyl group in the side-chain and was therefore named lunidine (V). The other one (VIII) is a ...