CH3CH(CH3)CH(CH3)2中的括号是什么意思

CH3CH(CH3)CH(CH3)2中的括号是什么意思 CH3CH(C2H5)CH(CH3)2 CH3CH(CH3)CH2CH(CH3)C(CH3)2CH2CH2CH2CH(CH3)CH(CH3)CH3 请问这个的标 CH3CH(CH3)CH[CH(CH3)2]CH2CH3系统命名? CH3CH(C2H5)CH2CH(CH3)CH(C2H5)CH(CH3)2是什么? CH3CH(CH3)CH=C(CH3)CH(CH3)CH3 CH3CH(CH3)CH(CH3)2 如何命名?括号里的甲基是前一个的支链吗? CH3CH(C2H5)CH(CH3)2的名称 1、CH3(CH2)2CH(CH3)CH(C2H5)2 2、CH3CH(CH3)2 3、CH3CH(CH3)CH2C(C ch3ch（ch3）ch（oh）ch3 CH3CH(CH3)CH(C2H5)C(CH3)3 ch3ch(c2h5)ch(c2h5)ch(ch3)2叫啥?