Possible of theirAntitumor Promoters in Spinacia Contents among Cultivars

Spinach leayes were found to contain two potent antitumor promoters as detected by the actiyity against tumor promoter-induced Epstein-Barr yirus activation. The active components were identified as 1-O-alinolenoyl-2-O-(7Z,10Z,13Z)-hexadecatrienoyl-3O-Ir-D-galactopyranosyl-sn-glycerol and 1,2-di-O-evli"olenoyl-3-O-li-D-galactopyranosyl-sn-glycerol by spectroscopic data and some chemical and enzymatic reactions. Their contents significantly yaried vvith the cultiyar and with the culture conditions.