solubility parameters of hydromorphone , codeine , fentanyl , and sufentanil were also calculated from respective hexane solubilities , melting points , and heats of fusion and were 11.7 , 10.9 , 9.8 , and 9.7 ( cal/cm3 ) 1/2 .
C0015846
fentanyl
C0143993
sufentanil