Acylphloroglucinol derivatives from Decaspermum gracilentum and their antiradical and cytotoxic activities

Abstract

Two new acylphloroglucinol derivatives, 1-(hexanoyl)phloroglucinol-α-d-arabinopyranoside (1) and 1-(hexanoyl)phloroglucinol-β-d-glucopyranoside (2), along with two known ones, 1-(acetyl)phloroglucinol-β-d-glucopyranoside (3) and ethyl 2,4,6-trihydroxybenzoate (4), were isolated from the EtOAc soluble fraction of EtOH extract of Decaspermum gracilentum. The structures of the new compounds were determined by extensive spectroscopic analyses including HRESIMS, 1D and 2D NMR data. Interestingly, all of the compounds showed ABTS^·+ radical scavenging activity with the IC₅₀ values less than 10 μM. Furthermore, compounds 3 and 4 displayed moderate cytotoxicity on human non-small-cell lung carcinoma cell line A549 (IC₅₀ = 50.9 μΜ) and human renal carcinoma cell line 786-O (IC₅₀ = 38.6 μΜ), respectively.

Keywords:

• Myrtaceae
• Decaspermum gracilentum
• acylphloroglucinol derivatives
• radical scavenging activity
• cytotoxic activity