"' 2CD-5EtO "'is a psychedelic phenethylamine 2C-D, where the 5-methoxy group of 2C-D has been lengthened to an ethoxy group . 2CD-5EtO is a representative example of the so-called " tweetio " compounds discovered by Alexander Shulgin and briefly mentioned in his book PiHKAL, which are homologues of the 2C family of drugs, where either one or both of the methoxy groups at the 2, 5-positions of the aromatic ring have been replaced by ethoxy.
