The molecule is an L-alpha-amino acid zwitterion obtained by transfer of a proton from the carboxy group to the amino group of L-beta-ethynylserine. The major species at pH 7.3. It has a role as an antibacterial agent and an antimetabolite. It is a tautomer of a L-beta-ethynylserine.
(2S,3R)-2-azaniumyl-3-hydroxypent-4-ynoate