Rewrite LUW query to work on z/OS

Hello

I've a table Table_val as follows:
   C1   C2
   ---- ----
   V1   val1
   V2   val1
   V2   val2
   V2   val3
   V3   val2
   V3   val4

Also there is a list of values to search in C1:
   V2, V2, V3, V4, Vempty, Vempty

I'm looking for an output like this:
   C1   C2
   ---- ----
   V4   ?
   V2   val1
   V2   val2
   V3   val2
   V2   val3
   V3   val4

Using DB2/NT 7.2.9 and executing this query
-------------------------------
   with
      Value_list(C1)
    as
     ( values
         ('V2'),
         ('V2'),
         ('V3'),
         ('V4'),
         ('Vempty'),
         ('Vempty')
      )
   select
      distinct
      value_list.C1 ,
      case when Table_val.C2 is null then '?' else Table_val.C2 end
   from
      Table_val
   right outer join
      Value_list
    on
      Table_val.C1 = Value_list.C1
   where
      Table_val.C1 <> 'Vempty';

-------------------------------

it works ok and outputs the desired data.

But  I need to run the query against the same data set on a DB2 OS/390
8.1.5
and then I got this error:

   SQL0104N  An unexpected token "Value_list" was found following "".
   Expected tokens may include:  "DSN_INLINE_OPT_HINT".  SQLSTATE=42601

Then the question is: How I need to rewrite the query in order to obtain
the
desired output using DB2 OS/390 8.1.5 ?

Thanks in advance

    Vicente