metabutoxycaine metabutoxycaine metabutoxycaine, marketed under the trade name primacaine, is a local anesthetic. it is used in dentistry. metabutoxycaineclinical dataroutes ofadministrationdental syringe (as novocaine is administered)pharmacokinetic datametabolismlasts for at least 12 hours after injection.identifiers iupac name 2-diethylaminoethyl 3-amino-2-butoxybenzoate cas number3624-87-1 ypubchem cid19247chemspider18160uniiamv9l2wt8kcomptox dashboard (epa)dtxsid40189787 chemical and physical dataformulac17h28n2o3molar mass308.422 g·mol−13d model (jsmol)interactive image smiles ccccoc1=c(c=cc=c1n)c(=o)occn(cc)cc inchi inchi=1s/c17h28n2o3/c1-4-7-12-21-16-14(9-8-10-15(16)18)17(20)22-13-11-19(5-2)6-3/h8-10h,4-7,11-13,18h2,1-3h3key:ljqwyefhnltpbz-uhfffaoysa-n (verify) patent: