From cultures of Penicillium concavorugulosum, this isomer of the preceding
alkaloid has been obtained. It also forms an amorphous solid which cannot be
crystallized and has [α]22436 + lAO (c 1.0, pyridine). It furnishes the corresponding dihydro derivative with m.p. 222-5°C (dec.).
Abe et al., Agr. Bioi. Chern., (Tokyo), 33,469 (1969)
Abe et al., Nippon Nogeikagaku Kaishi, 43, 575 (1969)
Yamatodani et al., A gr. Bioi. Chern., (Tokyo), 34, 485 (1970)
