Does anhydrotetracycline work well at activating the rtTA3 ?

We have not used anhydrotetracycline (a derivative of tetracycline) in house. On the Clontech web page anhydrotetracycline (cat# 631310) is described to be more effective than doxycycline or tetracycline at lower doses. We cannot claim that this is true since we did not test it with our rtTA3 in house. For more information on anhydrotetracycline vist the link below: http://www.clontech.com/products/detail.asp?tabno=2&catalog_id=631310&page=all