The difference between these two

I was reading about copy constructors for structs and i found this example:

#include <iostream>
 #include <string>

 using namespace std;

 struct SomeData {

   int * pd;
   string id;

   SomeData(SomeData & ref) {
     cout << "Copy Constructor called" << endl;
     pd = new int (*ref.pd) ;
     id = "Copy Constructed";
   }

   SomeData(string name) {
     pd = new int(0) ;
     id=name;
     cout << "Constructor for " << id << endl;
   };

   ~SomeData() {
     cout << "Destructor for " << id << endl;
     delete pd;
   }
 };

 int main() {
   SomeData s("First") ;
   *s.pd =9;
   SomeData s2=s;
   cout << *s2.pd << endl;
   return 0;
 }

in the main , the variable pd of SomeData is accessed using the dereference, but why is that, isn't the correct way is

s->pd=9;

why was it written like that in the example ?