Назовите вещества:
1. ch3-ch2-ch2-ch2-ch3
2.ch3-ch2-ch(ch3)-ch2-ch2-ch3
3.ch3-c(ch3)-ch2-ch(ch2)(ch3)-ch2-ch2-ch3
4.(ch3)-ch-ch(ch2)(ch3)-ch(ch3)
5.ch3-ch(ch3)-ch(ch3)-c(ch2)(ch3)-ch2-ch3