From bark of Laurelia novaezelandiae A. Cunn, Lauraceae. Isoln: Aston, J. Chem. Soc. 97, 1381 (1910); Bernauer, Helv. Chim. Acta 50, 1583 (1967). Structure: Barger, Giradet, ibid. 14, 481, 504 (1931); Barger, Schlittler, ibid. 15, 381 (1932). Total synthesis: Zymalkowski, Happel, Tetrahedron Lett. 1969, 219; Ber. 102, 2959 (1969); Kametani et al., J. Chem. Soc. Perkin Trans. 1 1972, 1435.