24-(Isopropyl(73Se)seleno)chol-5-en-3beta-ol 24-(Isopropyl(75Se)seleno)chol-5-en-3beta-ol 24-(Isopropylseleno)chol-5-en-3-ol 24-Iseceo 86508-37-4 Chol-5-en-3-ol, 24-((1-methylethyl)seleno)-, (3beta)-