“…NaOH (80 ml) was added, and the mixture was refluxed for 16 h. The solution was cooled and the aqueous layer was removed, extracted with CH,Cl, (50 ml), acidified, and extracted with ether (2 x 100 ml); the ether extract was dried over Na,SO, and evaporated. Recrystallisation of the crude product from light petroleum gave white needles (1.2 g, 9%) identified as 6-methyloctahydrocoumarin (16) (5), 111 (12), 96 (33), 81 (loo), 67 (36), and 55 (58); v 1740 cm-' (C=O) (Found: C, 71.2; H, 9.7. Calc.…”