The present invention provides a complex carbohydrate library which includes a plurality of complex carbohydrate structures each being attached to a specific site of a solid support such as a platform, thereby making each of the plurality of complex carbohydrate structures uniquely addressable. The addressable nature of the complex carbohydrate library of the present invention makes it particularly suitable for screening and isolating molecules that bind specifically and uniquely to complex carbohydrate structures associated with various disorders and conditions, thus enabling identification of new drugs candidates.