"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
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| Number | Title | Issue Date |
| 4517359 | 11-Methyl-11-aza-4-0-cladinosyl-6-0-desosaminyl-15-ethyl-7,1 3,14-trihydroxy-3,5,7,9,12,14-hexamethyl-oxacyclopentadecane-2-one and derivatives thereof 11-Methyl-11-aza-4-0-cladinosyl-6-0-desosaminyl-15-ethyl-7,13,14-trihydroxy -3,5,7,9,12,14-hexamethyl-oxacyclopentadecane-2-one and derivatives thereof, such as the 13,14-carbonate and C1 -C3 -alkanoyl derivatives thereof. The compoun... | 05/14/1985 |