Myo-inositol (1,2,3,4,5,6) hexakisphosphate in boat formation showing the 5 equatorial and the 1 axial group. Red oxygen, purple phosphorous and grey hydrogen atoms form phosphate groups on each of the blue carbon atoms that have been numbered according to the IUPAC-IUB recommendation. The special relationships between the atoms have been indicated with dots (software: ChemSketch 10.0, ACDlabs.com)