3d image of s-indacene skeletal formula

s-indacene benzene ring cyclopentane rectilinear arrangement indacene tricyclic-fused hydrocarbon annulene biosynthesis karugamycin spinosyn alkene cyclization reaction oxy-cope rearrangement substance matter material compound component agent stuff reagent functional group precursor synthesis production building block molecule molecular formula skeletal structural structure geometry ball stick cell biology biochemistry biomolecule bioactive chemistry science scientific research organic chemical 3d