Actually, I read this recently on Scent & Chemistry's Facebook page. I'll paste it here incase the link doesn't work for you.
"Just discovered this on www.kaufhaus-mittl.de, … so apparently it is official now that 'Molecule01' is not 'Iso E Super' (6.85/6) but in fact 'Iso Gamma Super' (6.120, cf. S&C p. 207–214), though the ad says 'Iso E Super Gamma'. But if you inject in the GC you find only the 'Iso Gamma Super' isomers in 'Molecule01' and a bit of DPG, and that explains why those who simply diluted 'Iso E Super' to make their own 'Molecule01' did not get the same smell, and were consequently disappointed. 'Iso E Super Gamma' had been captive with IFF for quite a while, and thus it was strange that it appeared in the first launches of Ormonde Jayne that were allegedly exclusively composed by Linda Pilkington."
So, there are different isomers of this chemical and different products with varying proportions of those isomers - Timbersilk is one of them.