methylprednisolone aceponate methylprednisolone aceponate methylprednisolone aceponate, or methylprednisolone acetate propionate, sold under the brand names advantan and avancort, is a glucocorticoid and a corticosteroid ester—specifically the c17α propionate and c21 acetate diester of methylprednisolone. methylprednisolone aceponateclinical datatrade namesadvantan, avancortother namesmethylprednisolone 17α-propionate 21-acetate; zk-91588ahfs/drugs.comconsumer drug informationatc coded07ac14 (who) identifierscas number86401-95-8 ypubchem cid63019drugbankdb14643 ychemspider56717 nuniiet54w9j4u2chebichebi:135762chemblchembl1697782comptox dashboard (epa)dtxsid2023301 echa infocard100.184.880 chemical and physical dataformulac27h36o7molar mass472.578 g·mol−13d model (jsmol)interactive image smiles ccc(=o)o1(cc21(c(32c(c4=cc(=o)c=c34c)c)o)c)c(=o)coc(=o)c inchi inchi=1s/c27h36o7/c1-6-23(32)34-27(22(31)14-33-16(3)28)10-8-19-18-11-15(2)20-12-17(29)7-9-25(20,4)24(18)21(30)13-26(19,27)5/h7,9,12,15,18-19,21,24,30h,6,8,10-11,13-14h2,1-5h3/t15-,18-,19-,21-,24+,25-,26-,27-/m0/s1 nkey:dalklaylipscql-ypyqnwscsa-n n ny (what is this?) (verify) in russia and some other countries the drug is available in 4 dosage forms differing in consistency and water content: emulsion (or lotion), cream, ointment and fatty ointment.