Synonyms: (-)-α-[[(2S)-Tetrahydro-5α-methyl-4-oxofuran]-2α-yl]-N,N,N-trimethylmethanaminium;(2S,5S)-Tetrahydro-4-oxo-5,N,N,N-tetramethyl-2-furanmethanaminium;(2S,5S)-Tetrahydro-N,N,N,5-tetramethyl-4-oxo-2-furanmethanaminium;2-Furanmethanaminium, tetrahydro-N,N,N,5-tetramethyl-4-oxo-, (2S-cis)-;Tetrahydro-N,N,N,5-tetramethyl-4-oxo-2-furanmethanaminium (2S-cis)-