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MCRs for preparation of chromenopyridines under reflux conditions and chromenes at room temperature conditions from diff......
摘 要：心理学研究揭示小学生天性好奇、好动、好胜，注意力不能持久，意志薄弱，很大程度上凭兴趣支配学习。因此，教师要努力培养和保持学......
Two new cyclic diarylheptanoids juglanin A (1) and juglanin B (2) were isolated from the pericarps of Juglans regia L.Th......
