Ggg. Manzardo et al., CHIRAL PHTHALID FLAVOR COMPOUNDS - STEROI SOMERS OF (3A-7A)-CIS-3-BUTYLHEXAHYDROPHTHALIDE IN CELERIAC (APIUM-GRAVEOLENS L VAR RAPACEUM), Zeitschrift fur Lebensmittel-Untersuchung und -Forschung, 203(6), 1996, pp. 501-506
In diethyl ether extracts from celeriac (Apium graveolens L. var. rapa
ceum) all four stereoisomers of (3a-7 a)-cis-3-butylhexahydrophthalide
were found to be present. The analyses were carried out by means of G
C, enantioselective GC acid GC-MS. The assignment of the relative conf
iguration of the diastereomers 3 and 4 was accomplished by NOE differe
nce spectroscopy.