2. Aromatic Aromatic part has 3 planar bonds. One of them is Hornshaped, functioning as a male8(+)for connection, and the other two function as female(-9using the holes. Female bonds can be converted into male bonds by inserting connector ORG-20. * Benzene ring: insert a male bond into female * Double bond: Use ORG-21 double bond lock for preventing double bond rotation. Fit the small protrusions on the bond into the cutouts of the double bond lock. (Fig-2) * Oxygen single bond 120°: This part becomes necessary for phosphate ester and when purine and pyrimidine rings are hydrogen bonded. In such cases, ORG-7 sp2 (aromatic oxygen) can be used after cutting off one females bond and it's root with nippers etc. (Fig-3)