prov:value
| - of from 2 to 5 carbon atoms such as allyl and the like; or alkoxycarbonyl alkyl, for example, lower alkoxycarbonyl lower alkyl wherein the alkyl or alkoxy have from 1 to 6 carbon atoms wherein lower alkoxy can be methoxy, ethoxy, propoxy, butoxy, pentoxy, and the like and lower alkyl is methyl, ethyl, propyl, butyl, pentyl and the like; Y is O or S; m is an integer of 1 to 3 and n is an integer o
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