ABSTRACT
Ronaldson et al., Aust J. Chem., 31, 215 (1978)
P. degelii. Three terpenoids.
Goh et al., J. Chem. Soc., Perkin I, 1560 (1978)
P. durville. TRITERPENOIDS: durvilldiol, durvillonol.
Huneck, Williams, Z. Naturforsch., 22B, 1182 (1967)
P. impressa. TRITERPENOID: stictic acid.
