Hymecromone impurity B - 7-hydroxy-2-methyl-4H-1-benzopyran-4-one

Hyoscine

Hyoscine butylbromide

Hyoscine butylbromide impurity E - (1R,2R,4S,5S,7S)-9-butyl-7-[[(2S)-3-hydroxy-2-phenylpropanoyl]oxy]-3-oxa-9-azoni atricyclo[3.3.1.02,4]nonane

Hyoscine hydrobromide

Hyoscine hydrobromide impurity B - (1R,2R,4S,5S,7s)-3-oxa-9-azatricyclo[3.3.1.02,4]non-7-yl(2S)- 3-hydroxy-2-phenylpropanoate

Hyoscine impurity A - (1R,2R,4S,5S,7s)-3-oxa-9-azatricyclo[3.3.1.02,4]non-7-yl (2S)-3-hydroxy-2-phenylpropanoate (norhyoscine)

Hyoscyamine impurity E - (1R,3s,5S)-8-azabicyclo[3.2.1] oct-3-yl(2S)-3-hydroxy-2-phenylpropanoate

Hyoscyamine sulphate

Hypromellose phthalate