Bis(indenyl)dimethylzirconium , its cas register number is 49596-04-5. It also can be called Zirconium,bis[(1,2,3,3a,7a-h)-1H-inden-1-yl]dimethyl- ; Bis(h5-indenyl)dimethylzirconium ; Bis(p-indenyl)dimethylzirconium .