“…NMR (100 MHz, CDCl 3 ):22.11 (C 8 cyclohexeno),22.16 (C 7 cyclohexeno),22.40 (C 4 piperidinyl),24.58 (C 11 , CH 3 acetyl),25.83 (C 3 , C 5 piperidinyl),26.09 (C 6 cyclohexeno),26.85 (C 9 cyclohexeno), 50.94 (C 2 , C 6 piperidinyl), 110.32 (C 3 , C 4 pyrrolyl), 123.11 (C 2 , C 5 pyrrolyl), 123.78 (C 5a ), 123.92 (C 9b ), 135.22 (C 9a ), 136.04 (C 2 ), 144.67 (C 1 ), 157.30 (C 3a ), 163.22 (C 5 ), 192.12 (C10 , CO) ppm. EI−MS (m/z): 379.23 [M + , 68%], 350.20 [M + − CHO, 21%], 323.20 [M + − pyrrolyl-CH 4 , 21%], 296.17 [M + − C 4 H 4 N−OCH 3 , 2%], 84.15 [M + − piperidinyl, 100%].Ethyl 5-(Piperidinyl)-1-(1H-pyrrolyl)-6,7,8,9tetrahydrothieno[2,3-c]isoquinoline-2-carboxylate (5b).…”