Further constituents from the bark of Tabebuia impetiginosa. 
Further study on the constituents from the bark of Tabebuia impetiginosa (Mart.  ex DC) Standley afforded twelve compounds, consisting of four iridoid glycosides, one phenylethanoid glycoside, five phenolic glycosides, and one lignan glycoside, along with seven known compounds.  The structures of these compounds were determined based on the interpretation of their NMR and MS measurements and by chemical evidence.