Compound: 2-Hydroxybutyric acid
SMILES: O=C(O)C(O)CC
InChIKey: AFENDNXGAFYKQO-UHFFFAOYSA-N
Synonyms: 2-Hydroxybutyric acid, 2-HYDROXYBUTANOIC ACID, 600-15-7, alpha-Hydroxybutyric acid, 2-hydroxy-butanoic acid, O0ADR0I4H5, NSC-6495, CHEBI:1148, RefChem:473411, 209-985-3, dl-2-hydroxy-n-butyric acid, DL-2-Hydroxybutyric Acid, 565-70-8, Butanoic acid, 2-hydroxy-, Butyric acid, 2-hydroxy-, MFCD00070502, Hydroxybutyric acid, .alpha.-Hydroxybutyric acid, (+/-)-2-hydroxybutanoic acid, .alpha.-Hydroxy-n-butyric acid, alpha-hydroxybutanoic acid, alpha-Hydroxy-n-butyric acid, S-2-hydroxybutyric acid, DL-2-Hydroxybutanoic acid, (RS)-2-Hydroxybutyric acid, UNII-O0ADR0I4H5, (1)-2-Hydroxybutyric acid, ethylglycolic acid, NSC 6495, -hydroxybutyric acid, EINECS 209-985-3, 2-hydroxy-butyric acid, alpha-hydroxy butyric acid, SCHEMBL6963, SCHEMBL463271, CHEMBL567588, orb1945026, SCHEMBL1005309, SCHEMBL1394214, SCHEMBL6593909, SCHEMBL8381959, DTXSID8041903, (+/-)alpha-hydoxy butyric acid, NSC6495, (R)-(+)-2-Hydroxybutanoic acid, 2-Hydroxybutanoic acid, AldrichCPR, EBC-47542, LMFA01050004, s6119, AKOS000121162, AKOS016053528, FH35031, SB44466, SB44876, SY234828, DB-017417, DB-066029, HY-113381, CS-0062339, H0227, NS00034281, NS00120051, EN300-27738, BUTANOIC ACID, 2-HYDROXY-, (+/-)-, D90822, BC3EA1BE-590C-48AC-ACE7-8989B8E96BFC, Q3288610, Z246073650, DL-2-Hydroxybutyric Acid (contains Polymolecular esterification product)
Theoretical properties:
molecular_formula: C4H8O3
molecular_weight: 104.10 g/mol
exact_mass: 104.047344113 g/mol
formal_charge: 0
hydrogen_bond_donor_count: 2
hydrogen_bond_acceptor_count: 3
rotatable_bond_count: 2
heavy_atom_count: 7
topological_polar_surface_area: 57.5 Å²
isotope_atom_count: 0
covalently_bonded_unit_count: 1
Physical properties:
Descriptions:
pubchem: 2-hydroxybutyric acid is a hydroxybutyric acid having a single hydroxyl group located at position 2; urinary secretion of 2-hydroxybutyric acid is increased with alcohol ingestion or vigorous physical exercise and is associated with lactic acidosis and ketoacidosis in humans and diabetes in animals. It has a role as a human metabolite and an algal metabolite. It is a hydroxybutyric acid and a 2-hydroxy monocarboxylic acid. It is functionally related to a butyric acid. It is a conjugate acid of a 2-hydroxybutyrate.
chebi: A hydroxybutyric acid having a single hydroxyl group located at position 2; urinary secretion of 2-hydroxybutyric acid is increased with alcohol ingestion or vigorous physical exercise and is associated with lactic acidosis and ketoacidosis in humans and diabetes in animals.
chembl: Unnamed Compound is a small molecule listed in the ChEMBL database but has not progressed to an approved clinical phase.
wikipedia: The Hydroxybutyric acids form a group of four-carbon organic compounds that have both hydroxy and carboxylic acid functional groups.  They can be viewed as derivatives of butyric acid.  The carboxylate anion and the esters of hydroxybutyric acids are known as hydroxybutyrates. β-hydroxybutyric acid is relevant to human health as it is a member of a class of products of fatty acid oxidation referred to as ketone bodies. 
The isomers are distinguished by the distance between the two functional groups and the branching.

alpha-Hydroxybutyric acid (2-Hydroxybutyric acid)
beta-Hydroxybutyric acid (3-Hydroxybutyric acid)
gamma-Hydroxybutyric acid (4-Hydroxybutyric acid, GHB)
2-Hydroxyisobutyric acid
3-Hydroxyisobutyric acid