Truncate Transaction Log Script Won't Work On Db Name With '-'

Hello all, I have a very simple script which I use to truncate and reclaim space on all the transaction logs in a SQL Server 2005 database. However, I have some Sharepoint db names I can't change that have dashes ('-') in the names, e.g., SharePoint_AdminContent_dc27334f-fb2d-4453-9764-5d8b730fb9e1. The script won't back up those databases because it has a problem with the dashes in the names. Does anyone have any thoughts on how I could modify the script to get it to work? Here is the script:

ALTER PROCEDURE [dbo].[SP_GlobalTruncate_transaction_logs]

AS

Set quoted_identifier off

DECLARE @dataname varchar(300)

DECLARE @dataname_header varchar(75)

DECLARE datanames_cursor CURSOR FOR SELECT name FROM sysdatabases

WHERE name not in ('master', 'pubs', 'tempdb', 'model', 'northwind')

OPEN datanames_cursor

FETCH NEXT FROM datanames_cursor INTO @dataname

WHILE (@@fetch_status <> -1)

BEGIN

IF (@@fetch_status = -2)

BEGIN

FETCH NEXT FROM datanames_cursor INTO @dataname

CONTINUE

END

SELECT @dataname_header = 'Database ' + RTRIM(UPPER(@dataname))

PRINT ' '

PRINT @dataname_header

EXEC('BACKUP LOG ' + @dataname + ' WITH TRUNCATE_ONLY')

EXEC('DBCC SHRINKDATABASE (' + @dataname + ',TRUNCATEONLY)')

FETCH NEXT FROM datanames_cursor INTO @dataname

END

DEALLOCATE datanames_cursor

PRINT ''

PRINT ' '

PRINT 'Free space removed and transaction log truncated for each user database'
GO

And here is the error I get:
Database SHAREPOINT_ADMINCONTENT_DC27334F-FB2D-4453-9764-5D8B730FB9E1

Msg 102, Level 15, State 1, Line 1

Incorrect syntax near '-'.

Msg 319, Level 15, State 1, Line 1

Incorrect syntax near the keyword 'with'. If this statement is a common table expression or an xmlnamespaces clause, the previous statement must be terminated with a semicolon.

Msg 102, Level 15, State 1, Line 1

Incorrect syntax near '-'.


Thanks so much for the help.