class="bi x0 y0 w1 h1"
class="bi x0 y1 w1 h2"
class="bi x1 y2 w2 h3"
class="bi x1 y3 w2 h4"
class="bi x1 y4 w3 h5"
class="bi x1 y4 w3 h5"
class="bi x1 y4 w2 h6"
class="bi x1 y4 w2 h7"
class="bi x1 y4 w2 h8"
class="bi x1 y4 w2 h9"
class="bi x1 y4 w2 ha"
class="bi x1 y4 w2 hb"
class="bi x1 y5 w2 hc"
class="bi x1 y5 w3 hd"
class="bi x1 y5 w3 hd"
class="bi x1 y5 w4 hd"
class="bi x1 y5 w3 hd"
class="bi x1 y5 w5 hd"
class="bi x2 y5 w6 he"
class="bi x1 y5 w4 h4"
class="bi x1 y5 w4 hd"
class="bi x1 y5 w3 hd"
class="bi x1 y5 w3 hd"
class="bi x3 y5 w7 hd"
class="bi x1 y5 w4 hd"

Trích đoạn Chiết với z-butanol s* Chiều cao cột silica gel: 20 cm

---