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Prostaglandin E3 (PGE3) is formed via the cyclooxygenase (COX) metabolism of eicosapentaenoic acid. In human ocular tissue, it comprises 2.4% of the COX products formed. When applied to the eyes of a rabbit, a 1 µg dose of PGE3 decreases intraocular pressure from 21 mmHg to about 17 mmHg. Formal Name: 9-oxo-11alpha,15S-dihydroxy-prosta-5Z,13E,17Z-trien-1-oic acid. CAS Number: 802-31-3. Synonyms: PGE3. Molecular Formula: C20H30O5. Formula Weight: 350.5. Purity: >98%. Formulation: A solution in methyl acetate. Solubility: DMF: >100 mg/ml (from PGE2), DMSO: >100 mg/ml (from PGE2), Ethanol: >100 mg/ml (from PGE2), PBS pH 7.2: >5 mg/ml (from PGE2). SMILES: O=C1[C@H](C/C=C\CCCC(O)=O)[C@@H](/C=C/[C@@H](O)C/C=C\CC)[C@H](O)C1. InChi Code: InChI=1S/C20H30O5/c1-2-3-6-9-15(21)12-13-17-16(18(22)14-19(17)23)10-7-4-5-8-11-20(24)25/h3-4,6-7,12-13,15-17,19,21,23H,2,5,8-11,14H2,1H3,(H,24,25)/b6-3-,7-4-,13-12+/t15-,16+,17+,19+/m0/s1. InChi Key: CBOMORHDRONZRN-QLOYDKTKSA-N.