2c-ef 2c-ef 2c-ef is a lesser-known psychedelic drug. it was originally named by alexander shulgin as described in his book pihkal (phenethylamines i have known and loved), but he never synthesised it himself, though it has been synthesised and its activity tested in subsequent years.: 770 2c-ef names preferred iupac name 2-ethan-1-amine identifiers cas number 1222814-77-8 3d model (jsmol) interactive image chembl chembl421439 chemspider 23206505 pubchem cid 44350106 inchi inchi=1s/c12h18fno2/c1-15-11-8-10(4-6-14)12(16-2)7-9(11)3-5-13/h7-8h,3-6,14h2,1-2h3key: kxpmrpnoyioxfy-uhfffaoysa-n smiles coc1=cc(=c(c=c1ccn)oc)ccf properties chemical formula c12h18fno2 molar mass 227.279 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references