C08HDERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS polysaccharides C08B; natural rubber C08C; natural resins or their derivatives C09F; bituminous materials C10The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: C08H7/00 covered by C08H6/00 C08H1/00Preparation C08H1/00Macromolecular products derived from proteins food proteins A23; glue, gelatine C09H C08H1/02Protein-aldehyde condensates C08H1/04Casein-aldehyde condensates C08H1/06derived from horn, hoofs, hair, skin or leather C08H3/00Vulcanised oils, e.g. factice C08H6/00Macromolecular compounds derived from lignin, e.g. tannins, humic acidsAttention is drawn to the following place, which could be of interest for search: Lignin or lignin derivatives, C07G1/00 C08H8/00Macromolecular compounds derived from lignocellulosic materials pretreatment thereof B27N C08H99/00Subject matter not provided for in other groups of this subclass , e.g. flours, kernels