pmid 2606099. pp. 436-437: Unsaturation 3s-two and a half > 자유게시판

This change was traditionally made to the parent name by adding a prefix to indicate the position, with or without Δ (Greek capital delta), which denotes unsaturation, for example, the legalsteroidshop.com 4-pregnen-11β,17α-diol-3,20-dione (also Δ4-pregnen-11β,17α-diol-3.20-dion) or 4-androstene-3,11,17-trione (also Δ4-androstene-3,11,17-trione).