Sodium 4-propoxybutane-1-sulfonate
= Sodium 4-propoxybutane-1-sulfonate
The salt $\mathrm{Na}^+[\mathrm{O_3S(CH_2)_4OCH_2CH_2CH_3}]^-$, a product of n-propoxide ring opening of a four-carbon sultone. The ether is at the former oxygen-bound terminal ring carbon.