Total phenolics were also quantified in the extract and were determined to be 87.2 mg galliacid equivalents (GAE)/gram of extract.
This indicated that while multiple phenolic compounds were present in the extract.
RA represented a significant portion of the phenolic load.
This is consistent with previous reports that the contribution of ra to the total phenolic content of S.officinalis ranges from 14% to 65% (Lamien-Meda and others 2010).
HPLC analysis revealed that phenolic compound other than RA were present in only minor amounts