How to create a class and save a list of that object?

I need to create a class that saves me 2 numbers and 1 string, I tried to create it like this:

 public class Coordenadas : MonoBehaviour
 {
     public string mov;
     public double cooX;
     public double cooy;
         
     public Coordenadas(string mv, double cX, double cY)
     {
         mov = mv;
         cooX = cX;
         cooy = cY;
     }
 }

So when I try to create a list of this object in a script I do it like this:

 public List<Coordenadas> playerLevelData = new List<Coordenadas>();

So I try to create the object and add it to the list:

 Coordenadas mov = new Coordenadas("D",Math.Round(transform.position.x),Math.Round(transform.position.y));
 
 playerLevelData.Add(mov);

but while running the game I get the following:

You are trying to create a MonoBehaviour using the 'new' keyword. This is not allowed. MonoBehaviours can only be added using AddComponent(). Alternatively, your script can inherit from ScriptableObject or no base class at all UnityEngine.MonoBehaviour:.ctor ()

I am quite a novice and I do not understand very well what the error is, I hope you can help me, thanks.