Thiomorpholine 1,1-dioxide hydrochloride59801-62-631 % similar 4-(4-Fluorophenyl)piperidin-4-ol3888-65-130 % similar 4-(4-Chlorophenyl)-4-hydroxypiperidine39512-49-730 % similar 4-(4-Bromophenyl)-4-hydroxypiperidine57988-58-630 % similar 4-(2,2,2-Trifluoroethyl)piperazine bishydrochloride13349-91-230 % similar