(1-alpha,3-beta,5Z,7E,24R)-9,10-Secocholesta-5,7,10(19)-triene-1,3,24,25-tetrol (24R)-24-Hydroxycalcitriol 1-alpha,24(R),25-Trihydroxyvitamin D3 56142-94-0 9,10-Secocholesta-5,7,10(19)-triene-1,3,24,25-tetrol, (1-alpha,3-beta,5Z,7E,24R)- Ro 21-7729