Description: 504 plant protecting and regulating compositions / 504 plant protecting and regulating compositions/(116.1) plant growth regulating compositions (e.g., herbicides, etc.) (189) organic active compound containing (326) containing nitrogen, other than as nitro or nitroso, attached directly or indirectly to carbon by nonionic bonding (327) ureas or thioureas (i.e., hnh-c(=x)-hnh, wherein x is oxygen or sulfur and substitution may be made for hydrogen only) (329) sulfur attached directly or indirectly to urea or thiourea nitrogen by nonionic bonding
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