My Opportunities may have up to 4 Product line items.
I am trying to copy the 4 Opportunity Product names to 4 Custom text fields. 

This throws an OpporunityLineItem not defined error and, I'm not sure how to find all line items

Thank you

    {!REQUIRESCRIPT("/soap/ajax/32.0/connection.js")} 
    {!REQUIRESCRIPT("/soap/ajax/32.0/apex.js")} 
    
    var record = new sforce.SObject("Opportunity"); 
    record.Id = '{!Opportunity.Id}'; 
    
    record.Sample_Product_Name_1__c=OpportunityLineItem.PricebookEntry.Name; 
    record.Sample_Product_Name_2__c= <<The next line item Name>>; 
    record.Sample_Product_Name_3__c= <<The next line item Name>>; 
    record.Sample_Product_Name_4__c= <<The next line item Name>>; 
    
    
    sforce.connection.update([record]); 
    window.location.reload();



This "should" work by placing everything into one field (Sample_Product_Name_1). Right?

This throws an "Invalid or Unexpected token" error

    {!REQUIRESCRIPT("/soap/ajax/32.0/connection.js")}
    {!REQUIRESCRIPT("/soap/ajax/32.0/apex.js")}
     
    var record = new sforce.SObject("Opportunity");
    record.oli ='{Select Amount,CloseDate,Name,
         (Select PricebookEntry.Product2Id,
                 TotalPrice,
                 UnitPrice,
                 ListPrice
          From OpportunityLineItems)
       From Opportunity}; 
    record.Id = '{!Opportunity.Id}';
    record.Sample_Product_Name_1__c= record.oli;
    sforce.connection.update([record]); window.location.reload();


Thank you for staying with me on this

This does not throw errors but it does not populate the field
    
    {!REQUIRESCRIPT("/soap/ajax/32.0/connection.js")}
    {!REQUIRESCRIPT("/soap/ajax/32.0/apex.js")}
    
    var record = new sforce.SObject("Opportunity");
    record.Id = '{!Opportunity.Id}';
    
    var retriveOpptyLineItems = sforce.connection.query("Select PricebookEntry.Product2.Name 
    From OpportunityLineItem 
    WHERE OpportunityId = '{!Opportunity.Id}'");
    
    
        record.Sample_Product_Name_1__c=retriveOpptyLineItems.records[0].PricebookEntry.Product2.Name; 
    
    window.location.reload();