razupenem razupenem razupenem (ptz-601) is a broad spectrum injectable antibiotic, from the carbapenem subgroup of beta-lactam antibiotics. it was developed as a replacement drug to combat bacteria that had acquired antibiotic resistance to commonly used antibiotics. razupenem performed well against a variety of bacterial strains, but further development is in doubt due to a high rate of side effects in phase ii clinical trials. razupenemclinical datatrade namesptz-601routes ofadministrationivlegal statuslegal status us: investigational new drug identifiers iupac name (4r,5s,6s)-6-((r)-1-hydroxyethyl)-4-methyl-3-((4-((s)-5-methyl-2,5-dihydro-1h-pyrrol-3-yl)thiazol-2-yl)thio)-7-oxo-1-azabicyclohept-2-ene-2-carboxylic acid cas number426253-04-5 ychemspider9168406 yunii26020h3q1lkeggd09658chemical and physical dataformulac18h21n3o4s2molar mass407.50 g·mol−13d model (jsmol)interactive image smiles 12n(c(c(o)=o)=c(sc3=nc(c4=c(c)nc4)=cs3)2c)c(1((o)c))=o inchi inchi=1s/c18h21n3o4s2/c1-7-4-10(5-19-7)11-6-26-18(20-11)27-15-8(2)13-12(9(3)22)16(23)21(13)14(15)17(24)25/h4,6-9,12-13,19,22h,5h2,1-3h3,(h,24,25)/t7-,8+,9+,12+,13+/m0/s1key:xfgomlirjyurlq-gokyhwassa-n