The mass spectrum of gerrardine, C11H19NO2S4, showed a molecular ion species corresponding to (C8H14NOS2)+, and Raney nickel desulphurisation gave a compound, C10H22O2, m. p. 33°, considered as decane-2,9-diol. The structure for the alkaloid is deduced as 1-methyl-2,5-bis-(4-hydroxy-1,2-dithiolan-3-yl)pyrrolidine.
