prov:value
| - , acylthio, mercapto, alkylthio, alkylsulfinyl or alkyl sulfonyl; each group, except hydrogen atom and alkyl, may be substituted or unsubstituted with alkyl; Ra represents hydrogen atom or alkyl; X??? represents ???CONRc-(Alka)r-R, ???(CH2)p???OC(???Y)???NRd-(Alkb)s-R or ???(CH2)q???NRe???C(???Z)???(NRf)w-(Alkc)v-R, where each of Rc, Rd, Re and Rf independently represents hydrogen atom or alkyl; e
|