Synthesis and evaluation of 1-[(3R,4R)-1-cyclooctylmethyl-3-hydroxymethyl-4-piperidyl]-3-[11C]ethyl-1,3-dihydro-2H-benzimidazol-2-one as a brain ORL1 receptor imaging agent for positron emission tomographyMikako Ogawa, Kengo Ito, Yasuhiro Kawasumi et al.|Nuclear Medicine and Biology|2002Cited by 16