alpha-pyrrolidinobutiophenone alpha-pyrrolidinobutiophenone α-pyrrolidinobutiophenone (α-pbp) is a stimulant compound developed in the 1960s which has been reported as a novel designer drug. it can be thought of as the homologue lying between the two better known drugs α-ppp and α-pvp. alpha-pyrrolidinobutiophenonelegal statuslegal status de: npsg (industrial and scientific use only) uk: class b us: schedule i identifiers iupac name (rs)-1-phenyl-2-(1-pyrrolidinyl)-1-butanone cas number13415-82-2 yhcl: 13415-54-8 ypubchem cid23199082chemspider16251917 nuniiy4b3axv4i4hcl: tvz2316jm4 ycomptox dashboard (epa)dtxsid40631251 chemical and physical dataformulac14h19nomolar mass217.312 g·mol−13d model (jsmol)interactive image smiles c2cccn2c(cc)c(=o)c1ccccc1 inchi inchi=1s/c14h19no/c1-2-13(15-10-6-7-11-15)14(16)12-8-4-3-5-9-12/h3-5,8-9,13h,2,6-7,10-11h2,1h3 nkey:gsesdifgjccbhn-uhfffaoysa-n n ny (what is this?) (verify) legality in the united states, it is a schedule i controlled substance. sweden's public health agency suggested to classify α-pbp as hazardous substance on november 10, 2014. as of october 2015 α-pbp is a controlled substance in china.