rac-(5R,5aS,6aR,7S)-2-phenyl-9-vinyl-5a,6,6a,7-tetrahydro-1H,5H-5,7-ethenocyclopropa[d][1,2,4]triazolo[1,2-a]pyridazine-1,3(2H)-dione

3-vinylcycloheptatriene

3-(Brommethyl)-1,3,5-cycloheptatrien