Akuammilan-17-oic acid, 10-[(2.alpha.,7.alpha.,16S,19E)-19,20-didehydro- 2,7-dihydro-17-methoxy-17-oxo-1,16-cyclocorynan-2-yl]- 1,2-dihydro-11-methoxy-1-methyl-, methyl ester, (2.beta.)- NSC607166 Plumocraline