Oil prices dropped early on Monday after China and South Korea posted surprisingly weak economic data and on worries the prospect of a coordinated production cut by leading crude exporters seemed remote. Front-month Brent crude (LCOc1) was trading at $35.54 per barrel at 0157 GMT, down 45 cents, or 1.25 percent, from the last close. U.S. West Texas Intermediate (CLc1) was down 35 cents at $33.27 a barrel.