Synonyms: Spiradine D(neutral), 15,16-didehydro-16,17-dihydro-9-hydroxy-;5H,9H-9,12-Methano-11a,4,7a-[1]propanyl[3]ylideneindeno[1,2-g]oxazolo[3,2-a]azocin-16-one,1,2,3a,4,6,7,7b,8,12,12a-decahydro-7b-hydroxy-4,10-dimethyl-, [3aR-(3aa,4a,7aa,7ba,9b,11aa,12b,12ab,17S*)]-; Spirasine I