Reach Scripting Define Symbols in Runtime

Is there a way to list the "Scripting Define Symbols" in runtime? I know I can reach them through EditorUserBuildSettings.activeScriptCompilationDefines but I need a runtime version of it.

Alternatively I can also use a similar field in my own scripts, if the above is not possible, how can I parse a string as a preprocessor directive? I know that #if "some_string" wouldn't work. How does Unity #define those strings in the background anyway?

To provide some background info, what I want to do is, I want my script to delete the object if some preprocessor condition is met. And I want to assign those conditions through the Inspector. Like below.

 public string[] conditions;
 
 void Awake() {
 #if conditions
     Destroy(gameObject);
 #endif
 }