Spiro[2,9-dioxa-14-azabicyclo[9.5.1]heptadec-11-ene-5,2'-oxirane]-3,8,17-trione,7-hydroxy-3',6,7,14-tetramethyl-, [1R-[1R*,5S*(S*),6S*,7R*]]-; Senecioracenine
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