and X1 having the meaning of CCOOH or CCOO-alkyl; G is an amine protective casing; and one of G1 and G2 represents a hydrogenator and the other hydrogens, alkyl, hydroxy, alkyloxy, aryl, alkanoyl-OCH2, aryl-OCH2 or COO-Rg or OCO-Rg; In the case of Rg, halogen, hydroxyl, alkyl...
(1)Hangzhou is the capital of Bprovince.A.JiangsuB.ZhejiangC.Fujian(2)The meaning of capital is B.A.首都B.省会C.资本(3) Ais the symbol of Hangzhou.A.West LakeB.Lingyin TempleC.Songcheng(4)Many Tourists can drink Cin Hangzhou.A.Hangzhou silkB.Dongpo meatC.Longjing ...
1. Complex population composition Migrant floating population accounts for a large proportion and its members are relatively complex. It can not be ruled out that some criminal record personnel are mixed up among them, causing certain security risks to community residents. 2. The backward management ...
provided that not more than three Ra-Rd groups have the same meaning and that X1 is not CCOOH or CCOO-alkyl; G = a protecting group; One of G1 and G2 is H and the other is H, alkyl, OH, alkoxy, aroyl, alkanoyl-OCH2, aroyl-OCH2 or COO-Rg or OCO-Rg; Rg = alkyl optionally...
provided that not more than three Ra-Rd groups have the same meaning and that X1 is not CCOOH or CCOO-alkyl; G = a protecting group; One of G1 and G2 is H and the other is H, alkyl, OH, alkoxy, aroyl, alkanoyl-OCH2, aroyl-OCH2 or COO-Rg or OCO-Rg; Rg = alkyl optionally...