for the following products
4-(2-Hydroxyethyl)-1-piperazine-3-propanesulfonic acid | HEPPS | N-2-Hydroxyethylpiperazine-N'-3-propanesulfonic acid | [2-Hydroxyethyl]piperazine-N'-[3-propancesulfonic acid];4-(2-hydroxyethyl)-1-piperazinepropanesulfonicaci and HEPPS, EPPS