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1141 when b o i l e d w i t h KOH it i s t r a n s f o r m e d i n t o dl-homocamphoric a c i d [15]. D i s t i l l a t i o n o f ( 1 5 ) w i t h Sa(OH)p, g i v e s dl-camphor [161. JABER S. MOSSA A N D MAHMOUD M . A . y. O E t 2 + I02Et CO2Et E t ONa 0 C02Et 53 CAMPHOR [ 51 61 JABER S. MOSSA AND MAHMOUD M . A.

1 PI perchloric acid. The endpoint may be determined potentiometrically using a glass/calomel electrode pair. 3. 1. Thin Layer Thin-layer chromatography was performed using silica gel 60 F plates (Nerck); the solvent system was dioxane228etonitrile-methanol-conc ammonia (25f;) (60:36:5:4). One hundred mg of the sample was dissolved in lo ml of methanol, the solution spotted on the plate and subjected to ascending chromatography. After a front migration f o r at least 16 cm the plate was air-dried and sprayed with Dragendorff’s reagent.

3 o i s s i e r , Y. Dunas, C. Advenier, Compt. Rend. SOC. B i o l . , 232 (1973)3. L. Hansson, H. Aberg, S. Jameson, Karlberg 549 (1973). R. Malmcrona, Acta Pled. Scand. 4. A. Amery, L. B i l l i e t , R. k g l . J. Ned, 2 o 284 (1974). 5. &8aplar, 2. hunC H. Eofman, J. Kuftinec, PI. Bkreblin, F. Kajfez, A. ITa I, IT. Blazev i 6 , Acta Pharm. , 2 ( 2 ) , 1983) i n press, 6. EfidBreitmaier, 'iJ. Jeinheim, 1978. 2 7. E. F'Jarmo, Drugs Bcptl. Clin. Ses. 6 , 639 (1980). 8. %. F. Poole, J. -Zlatkis, J.

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