|-
| style="background-color:#99ccff;;padding:0.079cm;"| <center>'''3'''</center>
| style=";padding:0.079cm;"| <center>EP288055A1[http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_EP&FT=D&date=19881026&CC=EP&NR=0288055A1&KC=A1]</center>
| style=";padding:0.079cm;"| <center>10/26/1988</center>
| style=";padding:0.079cm;"| <center>MERRELL DOW PHARMACEUTICALS INC.</center>
|-
| style="background-color:#99ccff;;padding:0.079cm;"| <center>'''4'''</center>
| style=";padding:0.079cm;"| <center>EP241242A1[http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_EP&FT=D&date=19871014&CC=EP&NR=0241242A1&KC=A1]</center>
| style=";padding:0.079cm;"| <center>10/14/1987</center>
| style=";padding:0.079cm;"| <center>CETUS ONCOLOGY CORPORATION</center>