ERRATA Vol64 Section B 1967 Page 163 Footnotes. Transfer asterisked footnote at bottom of page to page 187. Page 207. The transylidation reaction scheme should be CH,=CH-CN + Ph,P=CHCO,Et CH,=CH--CO,Et + Ph,P=CH-CN Page 207 Reference 70. For 1967 88 5654 read 1966 88 5654. Page 208 line 10. For diazophospholidines read diazaphospholidines. Page 210 line 13. For Dickmann read Dieckmann. Page 216 line 21. For 2,2,7-read 2,2,2-Page 494 line 14-15. For nicotinamide mononucleotide19~ 21 read nicotin-arnidel9.21 639