ST5309384 Spiro[3,5,8-ethanylylidene-1H-pyrano[3,4-c]pyridine-10,3'-[3H]indol]-2'(1'H)-one, 5-ethenyl-3,4,4a,5,6,7,8,8a-octahydro-7-methyl-, [3R-(3.alpha.,4a.beta.,5.alpha.,8.alpha.,8a.beta.,9S*,10S*)]- Spiro[3,5,8-ethanylylidene-1H-pyrano[3,4-c]pyridine-10,3'-[3H]indol]-2'(1'H)-one, 5-ethenyl-3,4,4a,5,6,7,8,8a-octahydro-7-methyl-