Table 1 Composition of potential compounds in the water fraction of E.longifolia using LCMS/MS

Quassinoids

13 β,18-Dihydroeurycomanol

1.71

C₂₀H₂₈O₉

13,21-Dihydroeurycomanone

3.3

C₂₀H₂₆O₉

16-α-o-Methylneoquassin

3.1

C₁₅H₂₄O₄

3,4-Dihydrochaparrinone^a

3.75

C₁₉H₂₄O₉

Eurycomalactone

5.9

C₁₉H₂₄O₆

Laurycolactone B^a

6.5

C₁₈H₂₀O₅

Canthin-6-one alkaloids

Canthin-6-one^a

7.45

C₁₄H₈N₂O

β-carboline alkaloids

1-Methoxymethyl-beta-carboline

4.75

C₁₃H₁₂N₂O₃

7-hydroxy-beta-carboline 1-propionic acid

4.4

C₁₄H₁₂N₂O₃

β-Carboline-1-propionic acid^a

4.5

C₁₄H₁₂N₂O₂