pirlimycin pirlimycin pirlimycin hydrochloride belongs to the lincosamide class of antimicrobials. under the trade name pirsue, it is used in the treatment of mastitis in cattle. pirlimycinclinical dataroutes ofadministrationintramammaryatcvet codeqj51ff90 (who) identifiers iupac name methyl (2s-cis)-7-chloro-6,7,8-trideoxy-6amino]-1-thio-l-threo-α-d-galacto-octopyranoside cas number79548-73-5 ychemspider138508 nuniilm19jt6g5kkeggd08391 ychemblchembl1652611 ncomptox dashboard (epa)dtxsid30904249 chemical and physical dataformulac17h31cln2o5smolar mass410.95 g·mol−13d model (jsmol)interactive image smiles cc1ccn(c1)c(=o)n(2((((o2)sc)o)o)o)(c)cl inchi inchi=1s/c17h31cln2o5s/c1-4-9-5-6-19-10(7-9)16(24)20-11(8(2)18)15-13(22)12(21)14(23)17(25-15)26-3/h8-15,17,19,21-23h,4-7h2,1-3h3,(h,20,24)/t8-,9+,10-,11+,12-,13+,14+,15+,17+/m0/s1 nkey:hbjoxqrurqpdex-mhxmmlmnsa-n n ny (what is this?) (verify) activity pirlimycin is active against gram-positive bacteria, specifically staphylococcus aureus and coagulase negative species of staphylococcus and streptococcus. it has no activity against gram-negative bacteria. mechanism of action it is bacteriostatic and acts by inhibiting bacterial protein synthesis via binding with the 50s subunit of the ribosome.