| 摘要 |
1,175,442. Treating tobacco. H.-J. FROHLING. 3 March, 1967 [5 March, 1966], No. 12895/69. Divided out of 1,175,441. Heading A2C. The smoke flavour of tobacco is influenced by adding to the unsmoked tobacco a flavouring compound which occurs in the smoke of natural tobacco, and is a maleimide of general formula: in which R1 denotes hydrogen, methyl, or ethyl, and R2 denotes hydrogen, methyl, or ethyl, and R2 denotes hydrogen, methyl, or ethyl. The maleimide may be synthesized or isolated from a tobacco steam distillate. |
