US patent 4966845 (页面存档备份,存于互联网档案馆), "Microbial production of L-altrose", granted 1990-10-30, assigned to Government of the United States of America, Secretary of Agriculture
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US patent 4966845 (页面存档备份,存于互联网档案馆), "Microbial production of L-altrose", granted 1990-10-30, assigned to Government of the United States of America, Secretary of Agriculture