1 NYA (1r,3r,7e,17beta)-17-{(1r,2e,4r)-4-hydroxy-1-methyl-4-[(3s,5s,7s)-tricyclo[3.3.1.1~3,7~]dec-1-yl]but-2-en-1-yl}-2-methylidene-9,10-secoestra-5,7-diene-1,3-diol 1.000 2 YS2 (1r,3r,7e,17beta)-17-[(2r)-5-hydroxypentan-2-yl]-2-methylidene-9,10-secoestra-5,7-diene-1,3-diol 0.730 3 MC9 Calcipotriol 0.718