In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Absolute stereochemistries of the aplysiatoxins and oscillatoxin A, published in 1984-06-29, which mentions a compound: 58081-05-3, mainly applied to absolute configuration aplysiatoxin oscillatoxin; NMR proton aplysiatoxin oscillatoxin; CD aplysiatoxin oscillatoxin; crystal structure aplysiatoxin, HPLC of Formula: 58081-05-3.
CD and proton NMR spectral studies of the aplysiatoxins and derivatives, degradation products of the toxins, and an X-ray crystallog. anal. of 19,21-dibromoaplysiatoxin show that the absolute configurations of the ten asym. carbons are 3S,4R,7S,9S,10S,11R,12S,15S,29R,30R. The 31-nor compound, oscillatoxin A, has the same absolute stereochem. at C(3), C(4), C(7), C(9), C(10), C(11), C(12), C(15), and C(29).
Compounds in my other articles are similar to this one((R)-4-Hydroxydihydrofuran-2(3H)-one)HPLC of Formula: 58081-05-3, you can compare them to see their pros and cons in some ways,such as convenient, effective and so on.
Reference:
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem