Wuhan Natduct Co., Ltd. Is affiliated to tongji medical university. We study Mainly new chemical and pharmaceutical intermediates, and produce them by ourself. Our products include as follows: 1) 2, 4-dihydroxybenzaldehyde 2) 2, 4-dimethoxybenzaldehyde 3) 3, 5-dihydroxybenzaldehyde 4) 2, 4-dihydroxyacetophenone 5) 2, 4-dimeyhoxyphenylacetic acid 6) nitrendipine 7) 7-hydroxy-4-methycoumarin 8) 7-methoxy-4-methylcoumarin 9) estramustine