... : ST-1 Rebaudioside A 80%, 95%, 97%, 99% HPLC JECFA ST-2 Rebaudioside A 60% / Steviol Glycosides 90%, ... 95% HPLC JECFA ST-3 Stevioside 85%, 90%, 95% HPLC JECFA ST-4 Steviol Glycosides 85%, ... 90%, 95% HPLC JECFA Structural Formula: Description:1. ... an auxiliary method. Extraction Stevia herb / Stevioside HPLC