four-center-type reaction

beamsters British White calker box Chromobacterium violaceum diethyl-2-benzothiazole sulfenamide disengorge electrolytic refining cell Fagus hayatae hole azimuth angle kurzweil macpalxochitl Mount Eba myrtilos predorsal tract shovel-nose ray tertiary crusher time-delay transferred sensations transparency material variable-air-gap