Almotriptan Related Compound B (15 mg) (2-{5-[(pyrrolidin-1-ylsulfonyl)methyl]-1H-indol-3-yl}ethanamine hemifumarate) AlMotriptan Related CoMpound B Almotriptan USP RC B (Fumarate Salt) 5-[(1-Pyrrolidinylsulfonyl)methyl]-1H-indole-3-ethanamine (2E)-2-butenedioate (1:?) Almotriptan USP Related Compound B (Fumarate Salt) Almotriptan Impurity 5（Almotriptan USP Related Compound B）(Fumarate Salt) 2-(5-[(Pyrrolidin-1-yl-sulfonyl)methyl]-1H-indol-3-yl)ethanamine hemifumarate Almotriptan Related Compound B (2-{5-[(pyrrolidin-1-ylsulfonyl)methyl]-1H-indol-3-yl}ethanamine hem (1013545)