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Material and MethodsCajuput honey were obtained from Bac Lieu-Vietnam. Microwave processing of the honey samples (50 g) was performed without stirring in a microwave reactor operating (power level input 1600W = 32W/g = 100P) with continues power 30P (9.6W/g), 50P (16W/g), 70P (22.4W/g), for 20, 30, and 40 seconds.After all treatments and cooling of the samples to room temperature, RS, HMF, DN, water content and colour were determined as a function of time. Beside that, honey was stored at room (<25 C) and cool (<10 C) temperature for eight weeks, analyzed the main honey quality. RS can be investigated by the 3,5-dinitrosalicylic acid (DNS) method employing glucose as the

Eight sesquiterpenoids including costunolide (1), parthenolide (2), 11α,13‐dihydroparthenolide (3), 9β‐hydroxy‐dihydroparthenolide (4), (‐)‐bisparthenolidine (5), 11α,13‐dihydro‐β‐cyclocostunolide (6), α‐cadinol (7), magnograndiolide (8) were isolated from the barks and roots of Michelia alba. The structures of these compounds were elucidated by spectroscopic methods (MS, 1D and 2D NMR) and comparison with the reported data. Compounds 5‐8 have been isolated for the first time from Michelia alba.

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