All of the following compounds work at blocking the activating forms of a Hh signaling protein called "SMO." IP-926 team took a well known inhibitor and made it work better. GDC-0449 said I know I want to inhibit SMO lets make a brand new inhibitor (or class of molecules). Itraconazole was found during a Stanford screen and has been in use for the last 25 years for fungal infections.
--IP-926 synthetic derivative of Cyclopamine ...

News of Hedgehog Pathway Cancers Clinical Trials