sulopenem sulopenem sulopenem (cp-70,429) is an antibiotic derivative from the carbapenem family, which unlike most related drugs is orally active. it was developed in japan in the 1990s but has never been approved for medical use, however it has reached phase iii clinical trials on several occasions and continues to be the subject of ongoing research into potential applications, especially in the treatment of multiple drug resistant urinary tract infections. sulopenemclinical dataatc codenoneidentifiers iupac name (5r,6s)-6--7-oxo-3-sulfanyl-4-thia-1-azabicyclohept-2-ene-2-carboxylic acid cas number120788-07-0 ypubchem cid9950244drugbankdb15284chemspider8125855uniixx514bj1xwkeggd05969comptox dashboard (epa)dtxsid20869656 chemical and physical dataformulac12h15no5s3molar mass349.43 g·mol−13d model (jsmol)interactive image smiles c(12n(c1=o)c(=c(s2)s3cc(=o)c3)c(=o)o)o inchi inchi=1s/c12h15no5s3/c1-5(14)7-9(15)13-8(11(16)17)12(20-10(7)13)19-6-2-3-21(18)4-6/h5-7,10,14h,2-4h2,1h3,(h,16,17)/t5-,6+,7+,10-,21-/m1/s1key:flsuczwoemtfaq-prbgklepsa-n