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Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1994 , vol. 33, # 12 p. 1123 - 1128

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, , vol. 33, # 12 p. 1123 - 1128

Ullal; Shah; Wheeler
Journal of the Chemical Society, 1940 , p. 1499