we now demonstrate that the `` '' activated '' '' oxazaphosphorines , 4- ( 2-sulfonatoethylthio ) -cyclophosphamide , 4-hydroperoxy-cyclophosphamide and 4-hydroperoxy-ifosfamide , present as aqueous solutions in wells of conventional microtest tissue culture plates release a votile factor which may penetrate into the media of neighboring cultures and strongly reduce their growth and viability .
C0010583
y-cyclophosphami
C0020823
y-ifosfami