Similar names: 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid, HEPES, N-(2-Hydroxyethyl)piperazine-N'-(2-ethanesulfonic acid); 4-(2-Hydroxyethyl)-1-piperazineethanesulfonic acid; 1-[4-(2-Hydroxyethyl)-1-piperazinyl]ethane-2-sulfonic acid; 2-[4-(2-Hydroxyethyl)piperazin-1-yl]ethane-1-sulfonic acid; 2-[4-(2-Hydroxyethyl)piperazin-1-yl]ethanesulfonic acid; 2-[4-(2-Hydroxyethyl)piperazinyl]ethanesulfonic acid; 4-(2-Hydroxyethyl)piperazine-1-(2-ethanesulfonic acid); N-(2-Hydroxyethyl)piperazine-N'-2-ethanesulfonic acid; N-(2-Hydroxyethyl)piperazine-N'-2'-ethanesulfonic acid; N-(2-Hydroxyethyl)piperazine-N'-ethanesulfonic acid; N-2-Hydroxyethylpiperazino-N'-2-ethanesulfonic acid; NSC 166663; N'-(2-Hydroxyethyl)piperazine-N-(2-ethanesulfonic acid); N'-2-Hydroxyethylpiperazine-N-2-ethanesulfonic acid; TVZ 7; WAS 13