Напишите структурные формулы следующих соединений:

2,4,7-триметил-3,6-диэтилоктан 

2,3-диметилгексен-3

2,2,3-триметил-5-пропил-4,6-диэтилоктан

2,2-диметил-5-изопропилгептен-3

2,2,4,4-тетраметилпентан 

1-бутил-4-этилбензол

2-этилбутандиол-1,3 

4,5-диметил-3-этилгексановая кислота

 

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Two thousand years ago the Roman conquest of the British Isles. They were at that time inhabited by Celtic tribes and the Romans were the most developed nation in the world. In 55 BC the Romans invaded the domain of the Celts. Celtic warriors fiercely attacked by aliens, and the Romans came back with nothing. A year later, the Roman troops attacked again and defeated the Celts.
In fact, the British Isles were conquered. The Celts continued to wage war against the Roman troops. To protect their conquest, the Romans had to be placed in a permanent British troops - and they brought in this region their culture. They built roads, bridges, baths and much more. They left in the local language a lot of Latin words. Roman rule ended in 407. The Roman legions were withdrawn from the islands to protect the central province of barbarians, and never went back there.