getting composite types info from libpq

Hello,

when a query returns a composite type, the libpq PQftype() function
reports the oid of the "record" type. In psycopg:

>>> cur.execute("select (1,2)")
>>> cur.description
(('row', 2249, None, -1, None, None, None),)

test=# select typname from pg_type where oid = 2249;
typname
---------
record

Is there a way to recursively retrieve the types for the record components?

Thanks,

-- Daniele