Antifungal antibiotic from Penicillium wortmanni Klocker: Brian et al., Trans. Br. Mycol. Soc. 40, 365 (1957). Similar to viridin, q.v. Structure: MacMillan et al., Chem. Commun. 1968, 613; eidem, J. Chem. Soc. Perkin Trans. 1 1972, 2898. Absolute stereochemistry: Petcher et al., Chem. Commun. 1972, 1061; MacMillan et al., ibid. 1063.