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n4google.
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isa:175726677
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A subgenus of compounds within this invention which are particularly advantageous in lacking irritant and iecrotizing properties and in being useful as antitumor agents are represented by the following: R1 162 R3 N Hi0 wherein R is acyl; R is hydrogen or taken together with R is a chemcal bond and R is alkoxy.
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n4:com
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isap:516240704
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isa:175726677