Hence this portion of the small intestine consists of a dextro- and sinistro-mesenteric segment.
Promorpha dipleura vel bilaterali, dextro et sinistro antimero symmetricis, plano sagittali annuloque separatis.
They're called d- and l-isomers—d for dextro, l for levo; right and left, you see.
In the amygdalin molecule, it exists in the dextro form, which has been named "prunasin."
dextro- or dextr-
On or to the right; right: dextroposition.