A:2,3
B:-2,3
C:3,2
D:3,-2
— So it is. It is still popular nowadays.
科学家发现,中草药成分中提取的“汉防己碱”能有效避免病毒进入细胞,有助于预防埃博拉感染,其分子式为C38H42N2O6.请回答: