How To Add Product Details into Invoice Section Of Zoho CRM using Map() ?

How To Add Product Details into Invoice Section Of Zoho CRM using Map() ?

Hi,

I am currently adding the data from zoho creator to the invoices section of zoho crm. I using the following process shown in the url below,

https://kbase.creator.zoho.com/crm/push-to-zoho-crm

I could able to store the data related to the Invoices like Account Name,Subject.But i am not able to add data to the Product Details Section of Invoice.I want the "Product Name","Qty","List Price" to be stored along with the invoice data.
Below is the script i have written for mapping from zoho creator to zoho invoices crm.

  1.     myFieldMap=map();
  2.     myFieldMap.put("Invoice Date",input.Invoice_Date);
  3.     myFieldMap.put(("Account Name"),input.Name);
  4.     myFieldMap.put("Subject",input.Subject_field);    
  5.     response = zoho.crm.create("invoices",myFieldMap);

The above mapped fields like Subject,Account Name are the Invoices fields.
How can i map Product details like Product Name,Quantity,List Price,Unit price in the same script above,which will add data into Product Details Also.So when i click on a lead and check the invoice information, Product Name,Quantity,List Price,Unit Price should be displayed under Product Details section.

Please help me in implementing this functionality.