... i p thu d khoang 1640 - 1700 cm"' vi vay cac van h i p thu cua chiing da cdng hgp vao mdt van phd manh nhit vdi tin so khoang 1664 - 1699 e m ' nhu Vc=o Vc=c VNO furoxan 1482 v=c-o 1260 ghi d ... 2-metoxy-4-(3metyl-2-oxit-1,2,5-oxadiazol-4-yl)phenoxyaxetylhidrazin tdng hgp tir axit isoeugenoxyaxetic vdi mot sd andehit tham da Ciu dang c//;/'/ thu dugc hidrazon cd chira vdng furoxan Ca'u trtic ciia cac hidrazon da dugc x ... Lan, Nguyen Hiru DTnh Tap chf Khoa hgc DHSP Ha Ndi, s o l , - (2007) A Gasco, A J Boulton Furoxan and benzofuroxan Interscience Publishers, John Wiley & Sons, New York - London, 1981 723 Nguyen...