He announced this in a written interview with the Nikkei Asian Review, which was published on the diplomatic mission's Facebook page.
"Washington does not consider the possibility of unconditional extension of the START Treaty ... We are ready for further cooperation with the United States on arms control, but exclusively on a parity basis, based on the principle of mutual consideration of interests and concerns," he said.
Answering the questions of the publication, the ambassador noted that the United States, in exchange for its agreement to extend the agreement for five years, in an ultimatum form put forward a set of demands, according to which they expect concessions from Russia.
“In essence, the US wants to rewrite the verification mechanism of the treaty,” the diplomat said.
Antonov emphasized that the Russian side stands "for a comprehensive approach to agreements in this area, in which key factors must be taken into account."
"Among them are missile defense, ground-based medium and shorter-range missiles," global strike "means, hypersonic delivery systems, advanced space weapons and others," he added.
Earlier, Russian Foreign Minister Sergei Lavrov noted the unrealistic nature of the US conditions on the START Treaty.