Rebaudiosides T and U, minor C-19 xylopyranosyl and arabinopyranosyl steviol glycoside derivatives from Stevia rebaudiana (Bertoni) Bertoni

Two steviol glycosides (1, 2), together with five compounds with no sugar moiety at C-19, were isolated from commercial Stevia rebaudiana crude extracts or prepared from known natural glycosides. The presence of an arabinose moiety in steviol glycosides is also reported.118