“…In agreement with d 63.7 d 134.9 d 131.6 80.4 142.2 104.9 23.8 d 64.2 d 135.7 d 131.8 80.4 165.3 199.1 23.7 13' t 77.2 d 128.9 d 128.1 96.4 163.7 197.9 -14a d 83.3 d 133.1 d 127.7 96.5 164.8 198.2 21.3 14b d 83.6 d 134.0 d 128 2 (5-7, 9, lo), 125.4 f 0.6 (8, [12][13][14][16][17][18]; C-8, S, 104.9 f 0.1 (5-7, 9, lo), 198.5 f 0.8 (8,(12)(13)(14)(16)(17)(18); C-9, t, 43.6 f 0.1 (5-7), 44.6 f 0. 1 (9, lo), 49.9 f 0.6 (8, [12][13][14][16][17][18]; C-10, S, 39.2 f 0.1 (5-7, 9, lo), 41.1 f 0.9 (8,(12)(13)(14)(16)(17)(18) (4a RS,8a RS) -2,4a,5,6,8,8a-Hexahydro-4a-hydroxy-2,2,5,5,8a-pentarnethyZ-7H-l-benzopyran-7-one (21): From 16.8 g (60 mmol) of 11; yield 7.6 g (54%) of 21, m.p. 107°C.…”