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27.7 甾体的生物合成
甾体是经过大量修饰的三萜类化合物，在生物体内由法尼基二磷酸 (C_{\text{15}}) 生物合成。还原二聚化首先将法尼基二磷酸转化为 a
1. Steroids are heavily modified triterpenoids that are biosynt
Steroids are heavily modified triterpenoids that are biosynt
2. Steps 1, 2 of Figure 27.15: Epoxide Opening and Initial Cyclizations
Steps 1, 2 of Figure 27.15: Epoxide Opening and Initial Cyclizations
3. Step 3 of Figure 27.15: Third Cyclization
Step 3 of Figure 27.15: Third Cyclization
4. Step 4 of Figure 27.15: Final Cyclization
Step 4 of Figure 27.15: Final Cyclization
5. Steps 5–9 of Figure 27.15: Carbocation Rearrangements
Steps 5–9 of Figure 27.15: Carbocation Rearrangements
6. Part 6
Part 6