pyrrolidinylthiambutene pyrrolidinylthiambutene pyrrolidinylthiambutene is an opioid analgesic drug from the thiambutene family with around 3/4 of the potency of morphine. it would be considered an illegal controlled substance analogue in some countries such as the us, australia and new zealand, but is legal in countries not possessing a controlled-substances-analog-act equivalent. pyrrolidinylthiambuteneclinical dataatc codenoneidentifiers iupac name 1-(1-methyl-3,3-di-2-thienylprop-2-en-1-yl)pyrrolidine cas number785722-57-8 ypubchem cid57503828unii3sfp7vpw6schemical and physical dataformulac16h19ns2molar mass289.46 g·mol−13d model (jsmol)interactive imagemelting point167 to 169 °c (333 to 336 °f) smiles c2cccn2c(c)c=c(c1sccc1)c3sccc3 inchi inchi=1s/c16h19ns2/c1-13(17-8-2-3-9-17)12-14(15-6-4-10-18-15)16-7-5-11-19-16/h4-7,10-13h,2-3,8-9h2,1h3 ykey:pijlunxaewabfk-uhfffaoysa-n y (verify)