sentences:  Shulgin speculates that the s-butyl isomer DSBT may be more potent than the straight chain compound DBT, but that the more highly branched DIBT and DTBT would probably be inactive due to the bulk of the substituent group.As for longer chain compounds than butyl, they have not been made and would probably be inactive.Shulgin mentions that the monohexyl compound NHT is without activity.