Failed as in it was too difficult to make . I know of one example. The oral version of glyx-13( nrx-1074 iirc) which a few tried to make and failed . Which is g

Failed as in it was too difficult to make . I know of one example. The oral version of glyx-13( nrx-1074 iirc) which a few tried to make and failed . Which is good since the non oral version failed fantastically at the phase 3 trials