label: 1-hydroxy-3-(indol-3-ylmethyl)-6H,7H,8H-5lambda(5)-pyrrolo[1,2-a]pyrazine + AH2 => (S)-3-(indol-3-ylmethyl)-6,7,8,8a-tetrahydropyrrolo[1,2-a]pyrazin-1-one + A + H(+)
label_lc: 1-hydroxy-3-(indol-3-ylmethyl)-6h,7h,8h-5lambda(5)-pyrrolo[1,2-a]pyrazine + ah2 => (s)-3-(indol-3-ylmethyl)-6,7,8,8a-tetrahydropyrrolo[1,2-a]pyrazin-1-one + a + h(+)