(1α,4α,4aα,7aα)-4,4a,7,7a-tetrahydro-1,4,8,8-tetramethyl-1,4-methano-1H-cyclopenta(d)pyridazine

丁二烯

1-((1S,3R,7R)-4,4-Dioxo-4λ6-thia-tricyclo[5.2.1.02,6]dec-8-en-3-yl)-pent-4-en-1-one

1-bromo-2-(chloromethyl)bicyclo(1.1.0)butane