55.48
[1]. Roy A, et al. Aminopropylation of vitamin D hormone (1α,5-dihydroxyvitamin D), its biological precursors, and other steroidal alcohols: an anchoring moiety for affinity studies of sterols. Steroids (1995), 60(8), 50-.
H15-H19-H5
P61-P80-P8-P40-P51-P5