bis(tert-butylimino)bis(dimethylamino)& ; bis(t-butylimido)bis(dimethylamido)tungsten(vi), min. 97% btbmw ; btbmw ; bis(tert-butylimino)bis(dimethylamino)tungsten(vi), for cambridge nanotech inc. ; bis(tert-butylimino)bis(dimethylamino)tungsten(vi) ; bis(tert-butylimino)bis(dimethylamino)tungsten(vi) packaged for use in deposition systems ; bis(tert-butylimino)bis(dimethylamino)tungsten(vi) 97%, 99.99% trace metals basis