2-(N-Morpholino)ethanesulfonic acid 2-Morpholinoethanesulfonic acid 4-Morpholineethanesulfonic acid 4-Morpholinethanesulfonic acid 4432-31-9 Ethanesulfonic acid, 2-morpholino- MES MES (buffering agent) Morpholineethanesulfonic acid Morpholino-N-ethylsulfonate NSC157116