Assertion: vitamin e's stereoisomer | /r/HasProperty | represented by the l or s enantiomer
Facets:
value: at the first stereocenter
type: LOCATION
Source sentences:
text: This is mainly due to reduced vitamin activity of the four possible stereoisomers that are represented by the l or S enantiomer at the first stereocenter (an S or l configuration between the chromanol ring and the tail, i.e., the SRR, SRS, SSR, and SSS stereoisomers).