The Building Blocks (BB) collection currently contains
over 13 000 natural and synthetic in-stock-available building blocks.

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The classification of the Building Blocks is indicated in the following fields.

PA  Primary Amines

SA  Secondary Amines

AL  Alcohols

AK  Aldehydes & Ketones

CA  Carboxylic Acids

ES  Esters

AN  Anhydrides & Haloanhydrides

PH  Phenols

AA  Aminoacids & their derivatives

PE  Peptides & their derivatives

CH  Carbohydrates & their derivatives

NU  Nucleotides & Nucleosides

ST  Steroids & Terpenoids

HAE  Haloid Alkyles & Epoxydes

SH  Thiols

OCC  Other Chemical Classes or Polyfunctional reagents

HY  Hydrazines & Hydrazones

IC  Isocyanates

ITC  Isothiocyanates

SC  Sulfochlorides