Table 4: Screening data for compounds 18-33.

Cmpd R, R1, R2 & R3 CC50 (µM)
HT29 PC3 MDA-MB-231
18 R1 & R3 = H, R2 = SCH3, R = benzyl 3.56±1.25 18.86±9.71 4.06±1.97
19 R1 & R3 = H, R2 = SCH3, R = furan-2-yl 33.25±3.43 39.79±6.81 41.16±7.60
20 R1 & R3 = H, R2 = SCH3, R = > 3.64±0.21 4.81±0.99 7.24±0.56
21 R1 & R3 = H, R2 = SCH3, R = aminomethyl 5.49±0.21 7.27±0.31 7.30±0.62
22 R1 & R3 = H, R2 = SCH3, R = 5.98±0.24 6.03±0.41 7.43±0.87
23 R1 & R3 = H, R2 = SCH3, R = 4.39±0.29 6.21±0.49 6.70±0.71
24 R1 & R3 = H, R2 = SCH3, R = 4.23±0.16 5.16±0.50 6.81±0.63
25 R1 & R3 = H, R2 = SCH3, R = 3.15±0.17 6.66±0.42 4.35±0.19
26 R1, R2 & R3 = OCH3, R = benzyl <0.098±0 0.52±0 <0.098±0.04
27 R1, R2 & R3 = OCH3, R = furan-2-yl >50.00 >50.00 >50.00
28 R1, R2 & R3 = OCH3, R = methyl 6.44±1.40 23.26±2.61 5.77±1.55
29 R1, R2 & R3 = OCH3, R = aminomethyl 8.51±1.70 17.92±2.08 9.92±2.13
30 R1, R2 & R3 = OCH3, R = 11.05±1.35 26.53±6.01 11.94±2.27
31 R1, R2 & R3 = OCH3, R = 5.21±0.39 11.95±1.47 8.87±1.38
32 R1, R2 & R3 = OCH3, R = 4.87±0.11 8.11±0.41 7.30±0.73
33 R1, R2 & R3 = OCH3, R = 5.67±1.67 11.94±1.56 8.20±0.99