1-Allyl-2-methyl-1H-imidazole

Synthesis of 2-O-Alkyloligoribonucleotides

7 ), ethyl (8 ), allyl (9 ), or butyl (10 ), with most studies being carried out with the methyl and allyl analogs.

Determination of Polyamines as Their Benzoylated Derivatives by HPLC

condensation with primary and secondary amines (Fig. 1 ), may also react with imidazole nitrogens and phenolic hydroxyl groups. However, benzoylation results in fewer side reactions than are seen with dansyl chloride and hence extensive clean-up procedures

毛撮 hair pencil

斑蝶科及夜蛾科昆虫的雄虫，尾端及胸部有一对毛束，打开成伞状，发散特殊的臭味。这样的毛束一般称为毛撮。斑蝶科雄虫在飞翔中与雌虫相遇时，将毛撮突出擦过雌虫的头部。雌虫感应后，便飞落地上，进行交尾。毛撮的分泌物是性外激素之一种，斑蝶科的Lycorca ceres ceres及 Danaus gilippus he-renice的鉴定结果是 2， 3-二氢化 -7-甲基 -1H吡咯烷嗪 -1-酮（ 2， 3-dihydro-7-methyl-1H-pyrrolizin-1-one）。