propyliodone propyliodone propyliodone (inn, trade name dionosil) is a molecule used as a contrast medium in bronchography. it was developed by a team at imperial chemical industries in the late 1930s. propyliodoneclinical dataother namespropyl (3,5-diiodo-4-oxopyridin-1(4h)-yl)acetateatc codev08ad03 (who) identifiers iupac name propyl 2-(3,5-diiodo-4-oxo-1,4-dihydropyridin-1-yl)acetate cas number587-61-1 ypubchem cid4949chemspider4780 nunii5npj6bpx36chemblchembl1200821 ncomptox dashboard (epa)dtxsid6023527 echa infocard100.008.731 chemical and physical dataformulac10h11i2no3molar mass447.011 g·mol−13d model (jsmol)interactive image smiles cccoc(=o)cn1c=c(c(=o)c(=c1)i)i inchi inchi=1s/c10h11i2no3/c1-2-3-16-9(14)6-13-4-7(11)10(15)8(12)5-13/h4-5h,2-3,6h2,1h3 nkey:rosxarvhjnyydo-uhfffaoysa-n n ny (what is this?) (verify)