propicillin propicillin propicillin is a penicillin. properties are similar to benzylpenicillin particularly used in streptococcal infections, not resistant to penicillinase. it is acid resistant and can be used orally as the potassium salt. propicillinclinical dataahfs/drugs.cominternational drug namesroutes ofadministrationoralatc codej01ce03 (who) identifiers iupac name (2s,5r,6r)-3,3-dimethyl-7-oxo-6--4-thia-1-azabicycloheptane-2-carboxylic acid cas number551-27-9 ypubchem cid92879chemspider83843 nunii8x1r260v33keggc13110 nchebichebi:52429 nchemblchembl1477112 ncomptox dashboard (epa)dtxsid3046291 echa infocard100.008.178 chemical and physical dataformulac18h22n2o5smolar mass378.44 g·mol−13d model (jsmol)interactive image smiles ccc(c(=o)n12n(c1=o)(c(s2)(c)c)c(=o)o)oc3=cc=cc=c3 inchi inchi=1s/c18h22n2o5s/c1-4-11(25-10-8-6-5-7-9-10)14(21)19-12-15(22)20-13(17(23)24)18(2,3)26-16(12)20/h5-9,11-13,16h,4h2,1-3h3,(h,19,21)(h,23,24)/t11?,12-,13+,16-/m1/s1 nkey:hocwpkxkmnxinf-xqeramjgsa-n n ny (what is this?) (verify)