using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;
public class Test
{
	public static void Main()
	{
		 var str = "90601.65 Автомобили и автомобильное хозяйство. 38.04.04. Государственное и муниципальное управление";
		 var result = Regex.Split(str, @"(?<!\d\.\d+\.\d+)\.\s+");
		 foreach (var item in result) 
		 	Console.WriteLine(item);
	}
}

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