Chemical Name: 9,11β-Epoxy-17,21-dihydroxy-16β-methyl-9β-pregna-1,4-diene-3,20-dione (as per EP)
Synonym: Betamethasone 9,11-Epoxy Impurity ;
Smiles: O=C1C=C[C@@]([C@@]23[C@H](C[C@@]([C@](C(CO)=O)(O)[C@@H](C)C4)(C)[C@]4([H])[C@]3([H])CC5)O2)(C)C5=C1
Inchi: InChI=1S/C28H38O6/c1-6-24(31)33-16-23(30)28(34-25(32)7-2)17(3)14-22-20-9-8-18-15-19(29)10-12-26(18,4)21(20)11-13-27(22,28)5/h10,12,15,17,20-22H,6-9,11,13-14,16H2,1-5H3/t17-,20+,21-,22-,26-,27-,28-/m0/s1